Question 1
In the redox reaction 2 S
2O
32-(
aq) + I
3-(
aq) → S
4O
62-(
aq) + 3 I
-(
aq), if 18.75 mL of 0.2500 M Na
2S
2O
3 is needed for complete reaction with 15.00 mL of the I
3- solution, what is the molar concentration of I
3-?
Question 2
A galvanic cell uses the reaction
Mg(s) + Pb2+(aq) → Mg2+(aq) + Pb(s).
Mg(
s) → Mg
2+(
aq) + 2 e
- is the ________ half-reaction, which occurs at the ________.