The EMF of the cell
Tl|Tl⁺(0.001M)||Cu²+(0.01M)|Cu
is 0.83V. The cell EMF can be increased by:
Show Hint
- Increasing the concentration of Tl⁺ ions
- Increasing the concentration of Cu²+ ions
- Increasing the concentration of Tl⁺ and Cu²+ ions
- None of these
The Correct Option is B
Solution and Explanation
Step 1: Cell reaction: Tl + Cu²+ → Tl⁺ + Cu
Step 2: Reaction quotient: Q=frac[Tl⁺][Cu²+]
Step 3: Nernst equation: E = E^∘ - (0.059)/(2)log Q
Step 4: To increase E, Q must decrease. • Increasing [Tl⁺] increases Q ⟹ E decreases • Increasing [Cu²+] decreases Q ⟹ E increases
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