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Consider the following at 25^ C A _ ( s ) | A _ 10⁻¹ M ^ + n | H _ 10⁻² M ⁺ | H ₂ Pt The e.m.f of cell is 0.89 V and E_ A A ^ +n ^ is +0.98 V . The value of ' n ' is [ . assume . 2.303 RT F =0.06 ]

Correct answer

2

Step-by-step solution

Cathode nH ⁺+ ne ⁻ n 2 H ₂ Anode aligned & A(s) A^ +n +n e⁻ & Q= (H₂ ) (A^ +n ) [H⁺ ]^n = (10⁻¹ ) (10⁻² )^n =10^ 2 n-1 & E=E_ cell ^ - 0.06 n 10^ 2 n-1 & 0.89=0.8- 0.06 n 10^ 2 n-1 & 0.09=- 0.06 n (2 n-1) & 0.09 n=-0.06(2 n-1) & 9 n=6(2 n-1) & 3 n=4 n-2 & n=2 aligned

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