1 ( a ) What is the emf of a cell made up of a copper electrode and a hydrogen electrode ( PH 2 2 atm) in copper sulfate (activity Cu 2 1) of pH 1 ( b ) What is the polarity of the cell and which electrode is anode 2 Calculate whether silver will corrode with hydrogen evolution in deaerated KCN sol...

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1. ( a ) What is the emf of a cell made up of a copper electrode...

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Question:

1. ( a ) What is the emf of a cell made up of a copper electrode and a hydrogen electrode ( PH₂ = 2 atm) in copper sulfate (activity Cu²⁺ = 1) of pH = 1?

( b ) What is the polarity of the cell and which electrode is anode?

2. Calculate whether silver will corrode with hydrogen evolution in deaerated KCN solution, pH = 9, when CN^- activity = 1.0 and Ag(CN)^2- activity is 0.001

3. Zinc is immersed in a solution of CuCl₂ . What is the reaction and at what activity ratio Zn²⁺/Cu²⁺ will the reaction stop?