4 L of a buffer solution is prepared that is 1 M N a 2 H PO 4 and 1 M N a 2 H PO 4 . The solution is divided into two halves between two compartments of a cell using Pt-electrodes. If a curren

Question

4 L of a buffer solution is prepared that is $1 M N a_{2} H PO_{4}$ and $1 M N a_{2} H PO_{4}$ . The solution is divided into two halves between two compartments of a cell using Pt-electrodes. If a current of 1.25 amp is passed for 200 minutes, the pH of the anode compartment is:

(Assuming the only reaction is electrolysis of water)

Given: pKₐ₁, pKₐ₂, and pKₐ₃ of H₃PO₄ are 3.07, 8.07, and 12.07.

Given: $l o g 1.85 = - 0.07$ and $1 F a r a d a y = 96500 C o u l o mb s$ .

(Consider 1 F = 10⁶ coloumbs)

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Correct answer: 8

Chemistry - Ionic Equilibrium Question with Solution | TestHub

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