The EMF of a galvanic cell composed of two hydrogen electrodes is 272 mV. What is the pH of the solution in which the anode is immersed if the cathode is in contact with a solution of pH = 3?

Question

Prashant Kotian · Accepted Answer

Correct answer: C. For a hydrogen concentration cell, E = 0.0591 * (pH_anode - pH_cathode). Given E = 0.272 V and pH_cathode = 3, substituting values gives: 0.272 = 0.0591 * (pH_anode - 3). 4.6 = pH_anode - 3. Thus, pH_anode = 7.6. Therefore, correct answer is C.

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