Question

For the titration of 20.0 mL of 0.0100 M Sn2 by 0.0500 M Tl3 in 1 M HCl, using Pt and Ag | AgCl electrodes:

for balanced equation

Sn²⁺+Tl³⁺ --->Sn⁴⁺+Tl⁺

with the following two half balanced reactions Sn⁴⁺+2e^- <--->Sn²⁺ Tl³⁺+2e^- <---> TI⁺

and with two Nernst equations for the cell voltage .The potential for the Ag | AgCl electrode is 0.197 V.    E=0.139-0.05916/2 log (Sn²⁺/Sn^4+)-0.197 E=0.77-0.05916/2 log (TI⁺/TI³⁺)-0.197

What is the value of E at the following volumes of added Tl³⁺ ? 1ml, 2ml, 3.90ml,4.0 ml, 4.10ml, 9.0ml.

(please show the work)

Answer 1