Why isn't n(I₂) = 2n(S₂O₃²⁻) in reaction 2?

Join the discussion
Registration is free. Ask a follow-up in this thread, or start your own.
2 replies · 3K views
Kolika28
Messages
146
Reaction score
28
Cl2(g) + 2I–(aq) -->I2(aq) + 2Cl–(aq) (reaction 1)
[2S2O3^(2-)(aq) + I2(aq) --> S4O6(2-)(aq) + 2I–(aq) (reaction 2)

Why isn't n(I2)(reaction 2)=2n(S2O3^(2-))(reaction 2). I don't see why this is wrong.

<edit: remove size and italics>
 
Last edited by a moderator:
Chemistry news on Phys.org
Kolika28 said:
Cl2(g) + 2I–(aq) -->I2(aq) + 2Cl–(aq) (reaction 1)
2S2O3^(2-)(aq) + I2(aq) --> S4O6(2-)(aq) + 2I–(aq) (reaction 2)

Why isn't n(I2)(reaction 2)=2n(S2O3^(2-))(reaction 2). I don't see why this is wrong.
Your second equation as you showed is correct. Not sure what confuses you. Did you check the electrons count? I did not check carefully myself, but your "reaction 2" is the same (except for typesetting) as shown in the wikipedia article for "thiosulfate". Atoms there seem to balance and half-reaction electrons seem to be right.
https://en.wikipedia.org/wiki/Thiosulfate
 
Ohh, I found it out now.Thank you so much for your help:)