[intelibp1600]

Consider the titration of 25.0mL of 0.010M Sn2+ by 0.050M Tl3+ in 1M HCl, using Pt and saturated calomel electrodes to find the end point.

1) Write the balanced titration reaction
2) Write two different half-reactions for the indicator electrode.
3) Write two different Nernst equations for the net cell reaction.

Appreciate if someone can help me out. thanks!

[mike]

You must attempt these yourself first and show us your working out, then we will gladly help.

[intelibp1600]

I don't think i'm doing this right.

1) Sn2+ + Tl3+-  -> Sn4+ + Tl+
2) Sn4+ +2e- =>Sn2+ E0 = 0.139 V
    Ti3+ + 2e- => Tl+ E0 = 0.77

not sure if these are correct. the last one, i'm unsure

[Alberto_Kravina]

1) Sn2+ + Tl3+-  -> Sn4+ + Tl+

correct!

Just be caeful: you made a typing mistake (you wrote Ti instead of Tl)