Hi, Sorry to bother you, but if possible could you please change the colour of the highlighted text in future videos, as i am colourblind and although i can see that it is there, I can not read the highlighted text. if possible a colour very different to the background colour world be highly appreciated e.g Red, Green, Yellow. Thank you
Hi Sir! I will be sitting my GCSE Chemistry exam in a few more hours. I thanks you for all the help that you provided and the countless hours you have spent making these videos! You have helped me with my mock exams and I am sure that these videos will help me with my GCSE’s later today! Thank you and wish me luck 🥳💪🏾 P.S - Unlike other comments who never reply about how they did, I will reply to those who ask. That’s a change, isn’t it 😂
hey i just wanted to let you know that you really helped me with my science exams this year!! i binge watched all of your videos on the weeks leading up to the exams and the night before each and because of you, i did really well in my science exams and i got really good results so thank you so so much!!!
3:14 how do you know it is Zn +2, I don't understand how you can tell it forms a 2+ ion from looking at the equation. Can anybody help? Thank you so much for making these videos.
There is no easy way to tell from the equation so in the exam they would have to tell you. Infact, if you look at the product (ZnSO4), we know that the SO4 has a charge of 2- so the Zn must have a charge of 2+ but that's beyond GCSE.
@@jubileej1629 if you go onto aqa 'datasheet' formulae of some common ions, there is a whole list for the transition metal ions and that should hopefully help :)
hi, I just came across your video and wanted to thank you for making them. 3 years ago I did my gcse's and watched all of your vids for science and it really did boost my grades and I dont think I could've achieved my A*AA in science without you. thanks very much!
This man honestly made this so much easier. My teachers really made me think that oxidation and reduction and half equations were completely different things.
Hello sir! Thank you for the video. Quick question, would we be given the ionic charges in the exam or are we expected to remember them? If so, is there some sort of pattern that helps with remembering them?
You are meant to know that group 1 metals form +1 ions and group 2 metals form +2 ions. Group 6 non-metals form 2- ions and group 7 non-metals form -1 ions. Aluminium forms +3. Anything else you would be given.
you have helped me so much i have been struggling with chemistry and physics immensely but thanks to your channel i feel inspired to learn and i have gained so much more confidence thank you for all your amazing videos
thank god i clicked on this vid, i recently got told by my teacher that i should do the higher exam and was worried for a bit, but after watching a bunch of videos on this channel im living stress free🤣
You said in order to figure out which element is being reduced/oxidised in a symbol equation we would need the ions present, would those be given in an exam? If not how would we work those out. (2017 GCSE specification)
Well some we can work out, but the metals in the middle we can't so my teacher said they gonna be given to us. Say lithium has only 1 electron on the outer shell, it kicks the electron out and therefore since the one negative charge is gone Lithium becomes Li+ right?
Use the word RedOx Red is reduction and Ox is oxidation Red is on the left hand side and Ox is on the right hand side So if its reduction, all the electrons represented in the equation will be on the left. And if its oxidation the electrons will be repesented in the equation on the right
Hello sir - your videos are amazing and helpful - what my teacher says in an hour u put into a less than 5 min video! I have a question about the video however - i am stuck at it. At 2:05 i dont understand how oxidation is taking place because u say its losing electrons there is a +3e and i got confused Thanks! :-)
Since oxidation is loss of electrons, electrons have a negative charge which means once three of negatively charged electrons leave the aluminium atom, it becomes a Al³+ as it's got more positively charge than before. Hope that makes sense! U need to understand ionic compounds then you can get this
The arrow shows what is produced during the reaction. In this case, we produce the aluminium ion (Al3+) and 3 electrons. Because the aluminium atom (on the left of the arrow) has lost three electrons to form the aluminium ion (on the right), this is oxidation.
1:35 I thought it was the other way around 🤦🏾♂️🤦🏾♂️🤦🏾♂️🤦🏾♂️🤦🏾♂️🤦🏾♂️🤦🏾♂️😅😅😅😅 But thanks for making it clear, thank you and keep making these videos 👍🙂
You probably won’t reply but pls help my exam is next week. At 2:59 , why is the 2+ charge only applied to zinc on the zinc sulfate and not on the zinc on the left side of the equation.?? And vice versa with the copper charge..
That's because in copper sulfate, the copper is an ion (Cu2+) whereas on its own, copper is an uncharged atom. The same applies to Zinc, which is an ion (Zn2+) in zinc sulfate but uncharged on its own. The key idea is that in this reaction, the uncharged zinc atom donates two electrons to the copper 2+ ion, forming the zinc 2+ ion and an uncharged copper atom.
The thing with all the sciences is that I can understand a concept but I can't word it in a way the markscheme allows me to get marks. Like I understand the oxidation and reduction part but wording it with the half equations makes me so confused.
sir i have important question you know for the last example, could you write the half equation as Zn - 2e(-) ->>> Zn2(+) and for any other half equation like this
Please could you do a video on writing ionic equations in redox reactions because I really am struggling with understanding it and it would help me so much for my exam next month! :)
I have a question, you know in the video where you said that Cu was Cu2+ in the left side and Zinc was Zn2+ on the left side. Well how did you know that and how would you figure that out in an exam?
Information such as that would have to be given to you in the exam. Transition metals can have multiple ions and you're not expected to learn them. But you are expected to be able to use them.
On the last bit you told us the ions present but in the exam do we need to find this out ourselves because I don’t understand where you go the 2+ from did you make it up
rob bob Someine else asked the same question and he replied with Everything you need will be given in the exam. They're testing your understanding of the ideas.
Date: Friday 18/8/23 Going into year 11 and doing triple higher. Reply to this comment in 1 years time and I will actually let you guys know how I done unlike most people 😁
Hi. At GCSE level you cannot work out the charge on a copper ion. That's because copper is a transition metal. Transition metals can have different charges depending on the reaction. In the exam, you will be given any charges that you need.
Hi I was wondering with group 1 metals going down the group reacting with water. Do they react more vigorously due to the outer electron being lost more easily, due to the decrease in ionisation energy, hence the metal displacing the hydrogen atom happens more quickly leading to more heat to burst out when you mix the alkaline metals with the water?
0:48 i'm so confused please help oilrig means if it's oxisidies then it loses the electorns but then its saying somrthing diffrent would be very grateful if you reached out to me
There are two definitions of oxidised. If something is oxidised, then it has lost electrons. However, you can also say that something is oxidised if it reacts with oxygen.
hello, i really appreciate your videos - they really help me understand science more, however, my school still uses the old spec (not 9-1) and i can't seem to find those videos on your website. is it just me, or have you taken them down??
Hi. The old spec videos are still on TH-cam. You need to look at the playlists at the top and you'll find them all. I have taken them down from my website as most people who use it are in the UK and we all use the 9-1 specs now. Let me know if you have any trouble finding them.
I am struggling so bad to identify how the equations could possibly represent an atom oxidised or reduced. Am i looking at the 2e- or the Mg2+. The equations does not make sense and it is stressing me out
The fact that the Mg has LOST two electrons (to form Mg2+) means that it is an oxidation reaction. If the electrons are on the right hand side of the arrow, then they have been lost.
This guy is a total legend in my school! You save our grades and enlighten our stupid minds.
The human being,is a superior creature,and is potentially perfect.
@@shub9107 frankly we're anything but
He’s a really cool guy
SAME HERE! We all made fun of it in yr 8 and now 2 years later these lessons helped me so much! Genuinely really appreciative :)
@@shub9107 Humans potentially perfect, superior creatures 🤣🤣
I've got a chemistry test in two days and I'm not really good at chemistry but this man has really helped me to understand the basics. Thank you sir.
No problem at all and thanks for the comment. Good luck in your test.
i got a 7 in gcse chem with the help of your videos. thank you for helping me through gcses, i will definitely be using your channel for a levels! 😁
well done!
hhe don;'t post no A level videoss tho?
@@sushruthravishankar7200 he is literally uploading new a level videos
update?
How you doing with chem so far?
How could people dislike this video he is the best science teacher I know all the ones in school are shit
Hi, Sorry to bother you, but if possible could you please change the colour of the highlighted text in future videos, as i am colourblind and although i can see that it is there, I can not read the highlighted text.
if possible a colour very different to the background colour world be highly appreciated e.g Red, Green, Yellow.
Thank you
Yes that's not a problem at all. I'll make them yellow from now on. Let me know if that helps.
Thank you :)
Ethan Rogers I
legend
Such a gem
O- Oxidation
I- Is
L - Loss of electrons
R - Reduction
I - Is
G - Gain of electrons
Mad love for Shaun. He’s the only person that’s going to get me through chemistry 💞💞
why tf can’t i understand oxidation and reduction man
so real and im doing it as holiday homework for year 11 i wanna cry
i remember it like: "oil rig"- Oxidation Is Losing (eletrons), Reduction Is Gaining (eletrons) unless you dont understand how it works?
Ur not alone
Chemistry is so difficult!
It can seem that way. It just takes time.
@@Freesciencelessons if i want to do biochem in university, what is the minimum grade required to be eligible (or something)?
@@rishiyadav9007 it depends what university I think, but I'd say the minimum is a 6-7 maybe
Hi Sir!
I will be sitting my GCSE Chemistry exam in a few more hours. I thanks you for all the help that you provided and the countless hours you have spent making these videos! You have helped me with my mock exams and I am sure that these videos will help me with my GCSE’s later today! Thank you and wish me luck 🥳💪🏾
P.S - Unlike other comments who never reply about how they did, I will reply to those who ask. That’s a change, isn’t it 😂
I know it's late but how did you do :))
How did u do
pretty sure he said he would reply
did you get the results yet?
damn broke ur promise
Tomorrow's my test on this topic. With the help of your concept, I got full marks! Thank You Freesciencelessons!!!
If it’s tomorrow, how do you know what you got?
@@AveCastGames fortune teller
Thank you so much I haven’t been able to understand half equations at school but you explained it so well
hey i just wanted to let you know that you really helped me with my science exams this year!! i binge watched all of your videos on the weeks leading up to the exams and the night before each and because of you, i did really well in my science exams and i got really good results so thank you so so much!!!
No problem, I'm glad I could help. Thanks for letting me know and good luck in all your future studies.
@@Freesciencelessons thank you again :)
3:14 how do you know it is Zn +2, I don't understand how you can tell it forms a 2+ ion from looking at the equation. Can anybody help? Thank you so much for making these videos.
There is no easy way to tell from the equation so in the exam they would have to tell you. Infact, if you look at the product (ZnSO4), we know that the SO4 has a charge of 2- so the Zn must have a charge of 2+ but that's beyond GCSE.
Freesciencelessons few I thought I’d have to know for my exam
Freesciencelessons how do you know SO4 has a charge of 2 -
@@aliza672 they just tell us so we have to accept it ?
@@jubileej1629 if you go onto aqa 'datasheet' formulae of some common ions, there is a whole list for the transition metal ions and that should hopefully help :)
Exam in two hours..
How'd it go?
Asks literally 6 months later 😂
Top Dog lmaoo
Exam in 20 mins
@@atube9190 how did it go
Thanks for keeping it short and simple yet easily understandable
Shaun's always coming out with the most dapper of suits.
Respectfully, sheesh.
hi, I just came across your video and wanted to thank you for making them. 3 years ago I did my gcse's and watched all of your vids for science and it really did boost my grades and I dont think I could've achieved my A*AA in science without you. thanks very much!
Holy crap imma watch this man's videos now thanks my guy 😂
This man honestly made this so much easier. My teachers really made me think that oxidation and reduction and half equations were completely different things.
I really appreciate the teaching , it 's simple to understand
Sir i am an igcse student...
Ur videos are really very helpful and easy...
Just pray for me plz...i have a chemistry exam tomorrow.
This guys the reason I’m not gonna completely fail. Thank you 🙏
your brilliant and have helped me understand so may topics for my GCSE's! THANK YOU SO MUCH !!!!
Hello sir! Thank you for the video. Quick question, would we be given the ionic charges in the exam or are we expected to remember them? If so, is there some sort of pattern that helps with remembering them?
You are meant to know that group 1 metals form +1 ions and group 2 metals form +2 ions. Group 6 non-metals form 2- ions and group 7 non-metals form -1 ions. Aluminium forms +3. Anything else you would be given.
@@Freesciencelessons Thank you!!
@@Freesciencelessons thank you sir, that’s so helpful! :)
@@Freesciencelessons😊
my mans what music do you play at the start it slaps
morning walk by jingle punks :)
I do not know how he keeps explaining and i keep getting it but he keeps doing it and its blowing my mind
Same
you have helped me so much i have been struggling with chemistry and physics immensely but thanks to your channel i feel inspired to learn and i have gained so much more confidence thank you for all your amazing videos
Thank god for this video. Really. I'd fail all my exams if it wasn't for this guy. Just wish he did history videos too.
better explainatios than my teacher .precise and concise
thank god i clicked on this vid, i recently got told by my teacher that i should do the higher exam and was worried for a bit, but after watching a bunch of videos on this channel im living stress free🤣
i was doubtful anything would help me but this is actually super useful, thanks so much!
Thanks for this
I hate being a higher student who had a crappy teacher in year 10 so we didn't really understand this
Ellie Neko same, we've had a crappy teacher through yr 11 as well as 10
You said in order to figure out which element is being reduced/oxidised in a symbol equation we would need the ions present, would those be given in an exam? If not how would we work those out. (2017 GCSE specification)
Everything you need will be given in the exam. They're testing your understanding of the ideas.
You can actually work them out. If you want me to show you how reply to me, and ill write back explaining how.
How can you work them out?
Well some we can work out, but the metals in the middle we can't so my teacher said they gonna be given to us. Say lithium has only 1 electron on the outer shell, it kicks the electron out and therefore since the one negative charge is gone Lithium becomes Li+ right?
@@unaestrella1876 yes thats correct
yes! sean donnely is the bomb!
Plz help, isn't oxidation the loss of electrons and reduction the gain of ele (OILRIG)?
Yeah, it’s
Gaurav YT yes
Yes. Reduction is the gain of electrons to be more negatively charged which is why it is reduction
there is no way it was actually this easy istg the teachers in school just make everything so complicated
Thanks this is really going to help me get with my half equation homework
I LOVE YOU MR FREESCIENCELESSONES!!!!!!!!!!!!!!!!!!!!!!!!!!
Gosh this gcse seems so much more concise and better than the trainwreck that's my country's education board
This guy deserves a trophy for how many ppl he's helped
I've been sitting in class dumbfounded I watch this video and everything becomes clear in a matter of minutes
the video for 2016 is helping me actually
thnx a lot. Now I am understanding the ionic half equations easily!
i dont understand half equations
Use the word RedOx
Red is reduction and Ox is oxidation
Red is on the left hand side and Ox is on the right hand side
So if its reduction, all the electrons represented in the equation will be on the left. And if its oxidation the electrons will be repesented in the equation on the right
This is correct but if you were given a question on this you wouldn't gain all the marks by saying it's just because they're on the left/right side.
I just said that to help the person understand because it is quite a hard concept to grasp.
@@Mk-hc9jm omg this was seriously helpful...did not even realise that. thanks
@@Mk-hc9jm you literally helped me with my biggest problem in chemistry! Thank you so much I really appreciate it.
My exams are in less than a month, would appreciate if you release your revision workbook earlier.
this is for the new 9-1 exams lol
Maybe if you read the time tag of the comment, you'll see it was 8 months before you commented...
I am doing a degree in physics and i had to come back to these videos 3 years later for the chemistry
OILRIG helps.
Oxidation Is Loss (of electrons)
Reduction Is Gain (of electrons)
Hello sir - your videos are amazing and helpful - what my teacher says in an hour u put into a less than 5 min video! I have a question about the video however - i am stuck at it.
At 2:05 i dont understand how oxidation is taking place because u say its losing electrons there is a +3e and i got confused
Thanks! :-)
Because the aluminium atom has lost the three electrons to form the aluminium ion (Al3+) and the three electrons (3e-). That is why it is oxidation.
Ok awesome thanks!
Since oxidation is loss of electrons, electrons have a negative charge which means once three of negatively charged electrons leave the aluminium atom, it becomes a Al³+ as it's got more positively charge than before. Hope that makes sense! U need to understand ionic compounds then you can get this
Oh never mind, I see where you are at lol
Now that you have explained.. It's soo easy
Anyway thx!!
if the electrons are added on the right hand side then it is oxidation and if its added on the left its a reduction
god sent person, thank you very much
Hi, I was just wondering how you work out that copper sand zinc have an oxidation state of 2+ at 2:58 ?
Okay, imma be real this is the first time in a lifetime i actually understood something!! Thankyou... :,,,)
at 2:00, you said that the aluminium one was oxidation, but isn't it reduction because it has gained the electrons not lost?
The arrow shows what is produced during the reaction. In this case, we produce the aluminium ion (Al3+) and 3 electrons. Because the aluminium atom (on the left of the arrow) has lost three electrons to form the aluminium ion (on the right), this is oxidation.
Hi when will you be doing physics videos on 9-1, I love your videos by the way; they are very helpful and I learn a lot more than I do in lessons ;)
Thanks for the comment. I'll be releasing my first 9-1 Physics videos in around two weeks. I'm just finishing off the first part of Chemistry.
chem exam in like 2 hrs, let’s get it
1:35
I thought it was the other way around 🤦🏾♂️🤦🏾♂️🤦🏾♂️🤦🏾♂️🤦🏾♂️🤦🏾♂️🤦🏾♂️😅😅😅😅
But thanks for making it clear, thank you and keep making these videos 👍🙂
Keep doing things like this and smiling at the end, everyone will love u!!!!😋😋😘
Will you always be given the charge of the compound, for example the ZnSO4 in your example?
Chemistry exam in 4 days😩
Joshua Corpuz how was it
You probably won’t reply but pls help my exam is next week.
At 2:59 , why is the 2+ charge only applied to zinc on the zinc sulfate and not on the zinc on the left side of the equation.?? And vice versa with the copper charge..
That's because in copper sulfate, the copper is an ion (Cu2+) whereas on its own, copper is an uncharged atom. The same applies to Zinc, which is an ion (Zn2+) in zinc sulfate but uncharged on its own. The key idea is that in this reaction, the uncharged zinc atom donates two electrons to the copper 2+ ion, forming the zinc 2+ ion and an uncharged copper atom.
@@Freesciencelessons such a hero, replying after 6 years!
The thing with all the sciences is that I can understand a concept but I can't word it in a way the markscheme allows me to get marks. Like I understand the oxidation and reduction part but wording it with the half equations makes me so confused.
sir i have important question you know for the last example, could you write the half equation as
Zn - 2e(-) ->>> Zn2(+) and for any other half equation like this
Hi. Yes you can always show oxidation like that or Zn ---> Zn2+ + 2 electrons
great video keep the pace mate your doing well
Youuuu are the bestt sir!!Appreciate it
hello do we need to know the charges of everything in the reactivity series? for example o2-
No you don't need to know those. You should learn that group 1 ions are +1, group 2 are +2, group 6 are -2 and group 7 are -1.
it makes sm more sense now
Please could you do a video on writing ionic equations in redox reactions because I really am struggling with understanding it and it would help me so much for my exam next month! :)
This teacher is just too good
I have a question, you know in the video where you said that Cu was Cu2+ in the left side and Zinc was Zn2+ on the left side. Well how did you know that and how would you figure that out in an exam?
Information such as that would have to be given to you in the exam. Transition metals can have multiple ions and you're not expected to learn them. But you are expected to be able to use them.
On the last bit you told us the ions present but in the exam do we need to find this out ourselves because I don’t understand where you go the 2+ from did you make it up
rob bob Someine else asked the same question and he replied with Everything you need will be given in the exam. They're testing your understanding of the ideas.
How do we know if an equation is oxidised or reduced when there is a +2e- (- as the superscript) in both the equations?
imagine this guy telling a joke
He’s a king
@@sanamehta7915 well said
who tf would dislike this, like why??
I don’t understand how Cu2+ is a reduction
It's gaining electrons which is reduction.
Oxidation
Is
Loss of electrons
Reduction
Is
Gain of electrons
Just remember OILRIG
you're a live saver
Date: Friday 18/8/23
Going into year 11 and doing triple higher. Reply to this comment in 1 years time and I will actually let you guys know how I done unlike most people 😁
how did u do
escuse me sir for the example 2:58 how would i work out copper ion charge
plzz reply as soon as possible
Hi. At GCSE level you cannot work out the charge on a copper ion. That's because copper is a transition metal. Transition metals can have different charges depending on the reaction. In the exam, you will be given any charges that you need.
@@Freesciencelessons Ty sir
Who here was forced by their school to take triple science higher???
This guy showed me how to do this in minutes and my teacher was trying to teach me this for 1 hole hour 😂
Does it matter which way you write half equations
TechTube Vision no
You taught me more in 4 minutes than my teacher has taught me in 90
could the equation for the oxidation reaction for zinc be written as Zn - 2e- > Zn2+
With Cu2+ wouldn't it be oxidation because its a plus meaning it has lost 2 electrons?
No because it starts off as Cu2+ and GAINS 2 electrons; becoming Cu. It is reduced.
What is the best way of studying chemistry?
The best way I think is to watch all my videos and then answer the questions in my revision workbooks (which I'm releasing later this year).
Sir can you please briefly tell what would be the difference in the electrolysis of Dilute NaCl and Concentrated NaCl. I'm struggling quite a bit.
Sir, do you have to balance the half equations?
ie 2O + 2e^- > O2^-
With regards to the example you used
Hi I was wondering with group 1 metals going down the group reacting with water. Do they react more vigorously due to the outer electron being lost more easily, due to the decrease in ionisation energy, hence the metal displacing the hydrogen atom happens more quickly leading to more heat to burst out when you mix the alkaline metals with the water?
The question about zinc and copper sulfate how do u work out the ions present
As Zn is a transition metal how did you quickly identify it has to loose TWO electrons?
I love you so much. It is because of you that i have been able to pass my chemistry. Thank you!
0:48 i'm so confused please help
oilrig means if it's oxisidies then it loses the electorns but then its saying somrthing diffrent
would be very grateful if you reached out to me
There are two definitions of oxidised. If something is oxidised, then it has lost electrons. However, you can also say that something is oxidised if it reacts with oxygen.
@@Freesciencelessons thank you very much sir, your videos have been very helpful.
how do you know the ions present i dont get it? 2:54
thats my exact question have u found an answer?
@@unknown.20555 apparently they tell you in the exam
Do we have to remember the ionic charge of the atoms?
How do you know that the ions present for both Cu and Zn are 2+?
I understand that they are transition elements, but are they in Group 2?
No, transition elements are not in group 2. In the exam, you would be given the information that you need for transition metal charges.
Here’s a muemonic i came up with in terms of oxygen: ORREO- Oxidation Receives, Reduction Evicts Oxygen
OIL RIG Oxidation Is Loss Reduction Is Gain (of electrons) is easier for me
hello, i really appreciate your videos - they really help me understand science more, however, my school still uses the old spec (not 9-1) and i can't seem to find those videos on your website. is it just me, or have you taken them down??
Hi. The old spec videos are still on TH-cam. You need to look at the playlists at the top and you'll find them all. I have taken them down from my website as most people who use it are in the UK and we all use the 9-1 specs now. Let me know if you have any trouble finding them.
For those who need help use OIL RIG oxidation is gan reduction is loss
If oxidisation and reduction has 2 meanings how would you know in the question if they're asking for the electrons or the oxygen one?
They will tell you which one they want.
Freesciencelessons I see thanks!:)
I am struggling so bad to identify how the equations could possibly represent an atom oxidised or reduced. Am i looking at the 2e- or the Mg2+. The equations does not make sense and it is stressing me out
The fact that the Mg has LOST two electrons (to form Mg2+) means that it is an oxidation reaction. If the electrons are on the right hand side of the arrow, then they have been lost.