Nernst Equation
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•
Chemistry
•
University
•
Medium
Alice Hii
Used 188+ times
FREE Resource
6 Slides • 4 Questions
1
Nernst Equation
Uses
2
Uses of Nernst Equation
To predict effect of concentration ions on E value
To calculate Kc
To calculate Ksp
To calculate pH
3
To predict effect of concentration of ions on emf
For positive ions, the higher the concentration of ions, the more positive or the less negative the E value
For negative ions, the higher the concentration of ions, the more negative of less positive the E value
All the effect of concentrations of ions can be explain using Le Chatelier Principle
4
Multiple Choice
The Eo for copper half-cell is +0.34V. What is the possible E value for copper half-cell if the concentration of Cu2+ decrease from 1 mol dm-3 to 0.5 mol dm-3?
+0.32
+0.34
+0.36
5
To calculate Kc
6
Multiple Choice
For the equilibrium in Daniell cell, Zn(s) + Cu2+ (aq) → Zn2+ (aq) + Cu (s), the expression for log Kc is
0.0592 Eocell
0.0591 Eocell
7
To find Ksp
8
Multiple Choice
Write the Ksp expression for lead(II) chloride
Ksp = [Pb2+][Cl-]
Ksp = [Pb2+][Cl-]2
Ksp = [Pb2+]2[Cl-]
9
To calculate pH
10
Multiple Choice
The higher the concentration the acid, the lower the pH and the higher the Eo of the cell
True
False
Nernst Equation
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