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In a galvanic cell, Zn electrode is immersed in 1.00M Zn(NO2)2. Other half cell is Pt electrode with 1 atm H2 bubbling over it. This cathode is immersed in a solution o funknown H+ The cell voltage is 0.473 V at 298.15 K. What is the pH of the solution where the cathode is immersed?