You are the man! For some reason, for me, its very hard to concentrate during classes (don't even mention books). Your videos are extremely well explained and I can replay them anytime anywhere, even in a chemistry lesson!
@FinalTidusX It's easy to get this confused. The equivalence point isn't where the solution turns from acidic to basic. It's the point where the all of the weak acid is reacted (or "sopped up") with the added strong base. In this reaction, A weak acid reacts with a strong base to produce water and a weak base. After the Strong Base reacts with all of the weak acid, all we have left is the weak base, which will make the solution slighly basic. :] i hope that helps.
Wow, I'm so used to listening to Khan at 2x speed that, when I came from somewhere else and had the speed set to normal, I thought I was listening to a different person, lol.
well, it doesn't really need to be a strong acid or base, it just makes the calculations a whole lot easier. You could titrate using a weak acid or base, but then you'd have to make an ICE table to figure out what your concentration of H+ was at equilibrium, then make a second ICE table with the new concentrations and it's a whole big headache. If you use a strong acid or base you can know that if you use say a 0.1 molar acid, the concentration is 0.1 without having to do all that calculating
I douubt it if a weak acid can dissociate..bcz i learned it doesn't dissociate and if it does its like very very mild less then 10 % so just wanna make sure am I right or Am i doing it wrong??
@zaishaloveu If it didn't dissociate at all it wouldn't be an acid... or soluble for that matter. Considering Acids add protons (H+) to solution, it wouldn't be an acid if it didnt.
Sean Kim actually, because when a weak acid gives up its H+ ion (proton), it wants back really badly, thus making it a strong base. The reason it wants it back is because it has a strong connection with hydrogen, ie HF.
need the math involved, the concepts are great but at the end or another video we need to deal with some real math because my teacher tests our understanding via the math like all teachers so telling her that i understand doesnt help unless i can do the math.
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You are the man! For some reason, for me, its very hard to concentrate during classes (don't even mention books). Your videos are extremely well explained and I can replay them anytime anywhere, even in a chemistry lesson!
@FinalTidusX It's easy to get this confused. The equivalence point isn't where the solution turns from acidic to basic. It's the point where the all of the weak acid is reacted (or "sopped up") with the added strong base. In this reaction, A weak acid reacts with a strong base to produce water and a weak base. After the Strong Base reacts with all of the weak acid, all we have left is the weak base, which will make the solution slighly basic. :] i hope that helps.
Wow, I'm so used to listening to Khan at 2x speed that, when I came from somewhere else and had the speed set to normal, I thought I was listening to a different person, lol.
2 Liters to titrate a solution
god have mercy
well, it doesn't really need to be a strong acid or base, it just makes the calculations a whole lot easier. You could titrate using a weak acid or base, but then you'd have to make an ICE table to figure out what your concentration of H+ was at equilibrium, then make a second ICE table with the new concentrations and it's a whole big headache.
If you use a strong acid or base you can know that if you use say a 0.1 molar acid, the concentration is 0.1 without having to do all that calculating
he did explain it:
the conjugate base of the weak acid contributes to the basicity
Regards from iraq , you are doing more than great !!
Where can I find the video that follows this one? ie the one done by Sal himself (rather than someone else from Khan Academy)
correction: with 0.5M of NaOH, pH can only get as high as reaching 14-(-log0.5) or roughly 13.7
this is more helpful than both my book and professor!
anybody know a good website that has calculations worked out? If so, please let me know!
Good complementary video to watch during your breaks :)
I douubt it if a weak acid can dissociate..bcz i learned it doesn't dissociate and if it does its like very very mild less then 10 %
so just wanna make sure am I right or Am i doing it wrong??
why do you always have to titrate with a strong base?
can someone please explain why the titrant needs to be a strong base/acid?
I swear i feel like these videos are too good to be true like one day they're just gonna disappear cuz they were a hack..
@zaishaloveu If it didn't dissociate at all it wouldn't be an acid... or soluble for that matter. Considering Acids add protons (H+) to solution, it wouldn't be an acid if it didnt.
hmmm...godly tutorial...I think that's why my Audio Studio's preset is set to "Cathedral".
Would the pH always be 7 at the inflection (equivalence) point? Since there is an equal amount of H+ and OH-?
No. That's only true if we're titrating a strong acid with a strong base, or vice versa. The video explains this in more depth. :)
anyone else a PIRATE?
The concentration oc conjugate base matter in this case because weak acids produce strong conjugate bases.
Sean Kim actually, because when a weak acid gives up its H+ ion (proton), it wants back really badly, thus making it a strong base. The reason it wants it back is because it has a strong connection with hydrogen, ie HF.
thank you so much!!
this kind of vido helps us students a lot!!!
I agree with FinalTidusX, some of the things is not that obvious for us...
I like the Espinoa one
It’s in the green circle
Wow that was really helpful man. Thank you :)
Love equilibrium
I like the pink squiggly line
I really like this one
why arent you my chemistry professor...
need the math involved, the concepts are great but at the end or another video we need to deal with some real math because my teacher tests our understanding via the math like all teachers so telling her that i understand doesnt help unless i can do the math.
Ok, you answered my question that i had in the previous video :)
thank you
@FinalTidusX same here =/
That’s the down arrow
sal, can can you draw more circles around the HA(aq)? hahaha :)
I like the strong acd
Wow that’s the one mole
I like the top number
I like the ph of three
and what did you fail that you can't maturely handle opinions?
I see the two orange Arrows
Wow that’s hundred millimeters
the 7 on the scale is a fish
I don’t like the buffer
I hate how everyone says (aq) differently
so much for your screenname
Moles
It's really that easy??? Hahaha wow.... Wish I has found this sooner
That’s a funny letter
Ph
.5
i hate how he says aqueous. its ayyyyyyykweeous