A solution prepared by mixing 50.2 mL of 0.280 M AgNO3 and 50.2 mL of 0.280...

Free

50.1K

Verified Solution

Question

Chemistry

A solution prepared by mixing 50.2 mL of 0.280 M AgNO3 and 50.2mL of 0.280 M TlNO3 was titrated with 0.560 M NaBr in a cellcontaining a silver indicator electrode and a reference electrodeof constant potential 0.175 V. The reference electrode is attachedto the positive terminal of the potentiometer, and the silverelectrode is attached to the negative terminal. The solubilityconstant of TlBr is Ksp = 3.6 Ã— 10â€“6 and the solubility constant ofAgBr is Ksp = 5.0 Ã— 10â€“13..
What is the cell voltage when the following volumes of 0.560 MNaBr have been added?
(b) 1.0 mL (c) 16.1 mL (d) 24.1 mL (e) 25.0 mL (f) 25.4 mL (g)41.2 mL (h) 50.2 mL (i) 57.2 mL
Please show step by step

Answer & Explanation Solved by verified expert

3.9 Ratings (459 Votes)

b)added Br- concentration=0.560M*1ml/101.4ml=5.52*10^-3M

[Ag+]=0.28M*50.2ml/101.4ml=0.139M

[Ti+]=0.28M*50.2ml/101.4ml=0.139M

AgBr ksp=[Ag+][Br-]

TiBr ksp=[Ti+][Br-]

necessary minimum br- concentration=3.6^-6/0.139=2.59*10^-5

therefor [Ag+] in solution=5*10^-13/2.59*10^-5=1.93*10^-8

E=E⁰+(RT/NF)ln[Ag+]

E=E⁰+0.0059log[Ag+]

=0.175+0.0059 log1.93*10^-8=0.129v

c)added Br- concentration=0.560M*16.1ml/116.5ml=77.4*10^-3M

[Ag+]=0.28M*50.2ml/116.5ml=0.121M

[Ti+]=0.28M*50.2ml/116.5ml=0.121M

AgBr ksp=[Ag+][Br-]

TiBr ksp=[Ti+][Br-]

necessary minimum br- concentration=3.6*10^-6/0.121=2.975*10^-5

therefor [Ag+] in solution=5*10^-13/2.975*10^-5=1.68*10^-8

E=E⁰+(RT/NF)ln[Ag+]

E=E⁰+0.0059log[Ag+]

=0.175+0.0059 log1.68*10^-8=0.129v

d)added Br- concentration=0.560M*24.1ml/124.5ml=0.108M

[Ag+]=0.28M*50.2ml/124.5ml=0.113M

[Ti+]=0.28M*50.2ml/124.5ml=0.113M

AgBr ksp=[Ag+][Br-]

TiBr ksp=[Ti+][Br-]

necessary minimum br- concentration=3.6*10^-6/0.113=3.18*10^-5

therefor [Ag+] in solution=5*10^-13/3.18*10^-5=1.57*10^-8

E=E⁰+(RT/NF)ln[Ag+]

E=E⁰+0.0059log[Ag+]

=0.175+0.0059 log1.57*10^-8=0.129v

Get Answers to Unlimited Questions

Join us to gain access to millions of questions and expert answers. Enjoy exclusive benefits tailored just for you!

Membership Benefits:

Unlimited Question Access with detailed Answers
Zin AI - 3 Million Words
10 Dall-E 3 Images
20 Plot Generations
Conversation with Dialogue Memory
No Ads, Ever!
Access to Our Best AI Platform: Flex AI - Your personal assistant for all your inquiries!

Become a Member

A solution prepared by mixing 50.2 mL of 0.280 M AgNO3 and 50.2 mL of 0.280...

Free

50.1K

Verified Solution

Question

Chemistry

Answer & Explanation Solved by verified expert

Get Answers to Unlimited Questions

Membership Benefits:

Other questions asked by students