jamesfirst
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lol owned.
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CSSA chemistry (1 Viewer)
- Thread starter MagnificentOne
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jamesfirst
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man I nearly got owned in that q.
I didnt study button cell, but I guessed the chemistry part for it. Just did redox of silver and zinc.
Looks good!
muzeikchun852
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button cell is zinc and silver oxide.man I nearly got owned in that q.
I didnt study button cell, but I guessed the chemistry part for it. Just did redox of silver and zinc.
P
pinkcupcakes
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i had a blank and forgot my equations for the button cell in the exam.. fml
muzeikchun852
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UnrealAnchovies
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different to the one i use (button cell also).. my anode is something like: Zn + 2OH- ---> Zn(OH)2 + 2e-
MagnificentOne
^_^
i think your reduction equation is wrong?
Its the same thing. Muzeik's is just an oxidation half-equation from the table, yours just has spectator ions on either side
imZerroo
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my teacher almost said the same thing, when i wanted her to sign my dropping sheet.
BUT
then she said she think im really smart but i dont work hard enough and i have a bad attitude towards chem
i took that as a compliment and didn't drop. wanna kill that s.o.b now. im not smart enough to do chem, i worked hard at it. :/
Dylanamali
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Does anyone remember the MC question where it was like zinc is added to hydrogen. And it said which is the stronger reductant/which is the stronger oxidant.. What did people put?
imZerroo
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I put Zn is stronger reductant.
its either that or H+ are stronger oxidant.
So I guessed the Zn.
Took me 5 minutes to know wtf the q. was asking me TBH.
its either that or H+ are stronger oxidant.
So I guessed the Zn.
Took me 5 minutes to know wtf the q. was asking me TBH.
Dylanamali
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Yeah I was a bit confused.. because both are correct aren't they.. In the end I was just like wtf. and ended up putting B - which is zinc is the stronger reductant, aswell.
I think I put this because the oxidiser doesn't start the reaction the reductor does. Kinda. I don't even...
imZerroo
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It was soo hard, after my first go at MC, I ticked atleast 12 questions that I made sure I look back on. Spent so much time on MC.
Dylanamali
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I RECKON! usually I go through MC in like 15 mins - this one took me 30 mins .. =/
and after discussing things today with ppl I found out I got another few wrong.. so looks like I MIGHT just scrap in the 80's .. --
fucking exactly the same!!!
muzeikchun852
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i think it's right. it doesnt have to be neutral.
i putted H+ are stronger oxidant.
if i remember it right, the cathode produces the hydrogen gas. so the hydrogen has must be a stronger oxidant than the solution's ion (i forgot what is it).
Last edited:
_deloso
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that's correct cos Zinc is oxidising thus it is a reductant as it reduces hydrogen. But you can also argue that Hydrogen is a stronger oxidant (which was the other answer) as hydrogen causes zinc to oxidise. But I think Zinc starts the redox reaction so yeah I answered Zinc is the stronger reductant. hopefully it's right