You are titrating 100.0 mL of 0.0200 M Fe3 in 1 M HClO4 with 0.100 M Cu to give

Question

You are titrating 100.0 mL of 0.0200 M Fe3 in 1 M HClO4 with 0.100 M Cu to give Fe2 and Cu2 using Pt and saturated Ag | AgCl electrodes to find the endpoint.

(a) Write the balanced titration reaction.

(b) Complete the two half reactions for the Pt electrode.

E0=.161V for Cu 1/2 rxn

E0=.767V for Fe 1/2 rxn

Calculate the values of E for the cell when the following volumes of the Cu titrant have been added: (Activity coefficients may be ignored as they tend to cancel when calculating concentration ratios.)

a) 2.00ml

b) 10.0ml

c)18ml

d)20ml

e)22.5ml

f) 40ml

Explanation / Answer

a. Balanced equation:

Fe(s) + 2 HClO4(aq) = Fe(ClO4)2 + H2

b.two half reaction.

Fe3+ + e- ====è Fe2+   E0 = 0.676 V

Cu2+ + e - ===è Cu1+   E0 = 0.161 V

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.