Really helpful video - loved it. I've been struggling with electrolysis since year 10 (am in year 11 now) but this really helped. However for the predictions of the reactants at the cathode, it's more accurate to say "either hydrogen or the metal will be produced whichever one is less reactive *unless* the solution is molten". Thanks!
I know you're not reading but you just helped someone become an electrical engineer. TYSM. I don't know how to appreciate you. it might seem a bit weird but trust me , you helped me a lot. LOVE YOUU
@Youssef Remember the more negative the electrode potential is, the more difficult it is to reduce, so the easier it is to oxidize, the halogens have a more negative electrode potential so their ions are more easily oxidized in to their standard states than oxygen is. So the halogens would be released rather than oxygen when they're present. I hope this makes sense.
Thanks so much for explaining this. I was so frustrated in class that I didn't know what was going on! When I saw this I realized there are fairly simple rules to it. Thanks again!
this has helped me so much as i was really confused on how to find out the products of electrolysis..... thank you os much for taking the time and effort to do this
"oxygen is produced unless there is a group 7 element". The production of oxygen from OH- has oxidation potential of -0.40V, which is higher than group 7 element oxidations such as that of fluorine ion (-2.87V), chlorine ion (-1.36V), bromine ion (-1.09V), iodine ion (-0.54V). Therefore, wouldn't oxygen be more likely to be produced even in the presence of such group 7 elements?
@@sanchigupta7607 Lower value of reduction potential. But note I provided the Oxidation Potentials. You can just say the Reduction Potential is the negative of the Oxidation Potential, and you will see that the O2 reaction has a lower reduction potential than the Cl reaction, which would mean it's more likely to occur?
Not dumb, it's a good question! It starts off as a Cl- ion (as part of NaCl), then during electrolysis it loses an electron to become a neutral Cl atom. But then it pairs up with another Cl to become Cl2 🙂
If the non-metal is diatomic like with hydrogen it will form a covalent molecule. Hydrogen, Oxygen, Nitrogen and the Halogens all form 2 atoms bonded together.
Is anyone else confuse, cause at least in my syllabus, the products (at anode) for a diluted and concentrated aqueous solution will be different. If its a concentrated aqueous solution, the product is a halide but if it is diluted the product would be a OH (oxygen is released) please help
Beacuse oxygen, hydrogen and all halogens are diatomic molecules. Means they always come in 2. Like how you would see H2, not just H. So after the iodine become neutral it would react with another iodine atom to form a covelent bond
Iodide is the name of the ion, I-. When it turns back into a neutral atom, I, it is known as iodine. We only call it iodide when it is an ion, not a neutral atom. 😀
Really helpful video - loved it. I've been struggling with electrolysis since year 10 (am in year 11 now) but this really helped. However for the predictions of the reactants at the cathode, it's more accurate to say "either hydrogen or the metal will be produced whichever one is less reactive unless the solution is molten". Thanks!
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Really helpful video - loved it. I've been struggling with electrolysis since year 10 (am in year 11 now) but this really helped. However for the predictions of the reactants at the cathode, it's more accurate to say "either hydrogen or the metal will be produced whichever one is less reactive *unless* the solution is molten". Thanks!
I can't believe this brilliant video has less than five thousand views even after two years. What are people watching if not this.
Thankyou!! Glad it was helpful for you :)
@@misswetton tysm soo much. for making this video
You explained this better then any other TH-camr and my teacher. Thanks
me: gets the first practice question right
me: immediately subscribes halfway through the video
I know you're not reading but you just helped someone become an electrical engineer. TYSM. I don't know how to appreciate you. it might seem a bit weird but trust me , you helped me a lot. LOVE YOUU
lol. its been 5 days. since my comment and someone even liked
Thank you so much! This makes so much more sense now
Miss Wetton when I get an A* in my finals I'm coming to donate to this channel, definitely my life saver
@Youssef Remember the more negative the electrode potential is, the more difficult it is to reduce, so the easier it is to oxidize, the halogens have a more negative electrode potential so their ions are more easily oxidized in to their standard states than oxygen is. So the halogens would be released rather than oxygen when they're present. I hope this makes sense.
Tysm i was looking for an explanation
This video explained electrolysis in 14 minutes better than my teacher explained it in like 2 hours💀
Fr bro this teacher at my school is so bad at teaching and even gets the question wrong herself. TH-cam is way more reliable
@@slenderg0dwii868 u a bit late with the comment 😂
Thanks so much for explaining this. I was so frustrated in class that I didn't know what was going on! When I saw this I realized there are fairly simple rules to it. Thanks again!
this has helped me so much as i was really confused on how to find out the products of electrolysis..... thank you os much for taking the time and effort to do this
brilliant, really broken it down in a simple and comprehensible manner. Thank you :))
Thank you!! :)
This is such a great explanation!
Got a chemistry test tomorrow and this really helped!
You deserve an award ❤
Teacher you are awesome 💯. I was so stressed about these questions 😫 but now i am relieved 😅😅❤
"oxygen is produced unless there is a group 7 element". The production of oxygen from OH- has oxidation potential of -0.40V, which is higher than group 7 element oxidations such as that of fluorine ion (-2.87V), chlorine ion (-1.36V), bromine ion (-1.09V), iodine ion (-0.54V). Therefore, wouldn't oxygen be more likely to be produced even in the presence of such group 7 elements?
no, for anode the elements w lower value of potential are preferred
@@sanchigupta7607 Lower value of reduction potential. But note I provided the Oxidation Potentials. You can just say the Reduction Potential is the negative of the Oxidation Potential, and you will see that the O2 reaction has a lower reduction potential than the Cl reaction, which would mean it's more likely to occur?
@@MrYahya0101 wait yes ur right, do tell me if u find anything about it
thanks, this reallly helped.
Saved me. Thank you so much♥
Thank you i finally understand 💕💕💕💕
Glad it helped!
Very useful for my exam thank you
Why is cl2 produced in the electrolysis of molten sodium chloride? I thought it had a negative 1 charge
sorry I'm dumb
Not dumb, it's a good question! It starts off as a Cl- ion (as part of NaCl), then during electrolysis it loses an electron to become a neutral Cl atom. But then it pairs up with another Cl to become Cl2 🙂
Thanks. Well explained
8:59 why is h2 produced because for the others it’s just the atom without a number , i thought it turns back to a singular atom
If the non-metal is diatomic like with hydrogen it will form a covalent molecule. Hydrogen, Oxygen, Nitrogen and the Halogens all form 2 atoms bonded together.
Thank you for this video. 👍❤️
Short and sweet ❤
EXCELLLENT EXPLANATION
🙂
So this is all I have to know about electrolysis or are there more?
Sorry for the slow reply, you also need to know about electrolysis of aluminium which I have a video on.
aluminium oxide* to extract aluminium
Is anyone else confuse, cause at least in my syllabus, the products (at anode) for a diluted and concentrated aqueous solution will be different. If its a concentrated aqueous solution, the product is a halide but if it is diluted the product would be a OH (oxygen is released) please help
THANK YOU SO MUCH!!!!!!!!!!!!!!!!!!!!!!!
Thank you so much!
someone cooked here
Thanks!!!
Very helpful
4:47 why is it I2 that is produced and not just a singular Iodine????
Beacuse oxygen, hydrogen and all halogens are diatomic molecules. Means they always come in 2.
Like how you would see H2, not just H. So after the iodine become neutral it would react with another iodine atom to form a covelent bond
@@ChickenNCheese. I finished my gcses so I don’t need this anymore but thank you ❤️❤️❤️❤️🙏
will the reactivity series be given to us in mocks/exams etc?
no , you have to remember it
@@lucyyyyyyyffs
Although the video was very helpful but I think you should also have explained the case of inert and active electrodes
This video actually helped a lot and simplified electrolysis for me👍👍👍👍👍👍
Thanks a lot
Glad it helped!! :)
why does iodide turn into iodine
Iodide is the name of the ion, I-. When it turns back into a neutral atom, I, it is known as iodine. We only call it iodide when it is an ion, not a neutral atom. 😀
i finally get it
Really helpful video - loved it. I've been struggling with electrolysis since year 10 (am in year 11 now) but this really helped. However for the predictions of the reactants at the cathode, it's more accurate to say "either hydrogen or the metal will be produced whichever one is less reactive unless the solution is molten". Thanks!