doubts n electrochemistry

1.An electrochemical cell is constructed by immersing a piece of copper wire in 50ml of 0.1M CuSO4 soln and " " ' ' zinc wire in " " " ZnSO4 soln. If 50 ml of 1.5 M NH3 is added to CuSO4 soln then Emf of cell is= Ans 0.715V
given reduction potential of Cu and Zn are 0.34V and -0.76V respectively.

2.The equivalent conductances of CH3COOH,HCl,NaCl at infinite diluion are 91,426,126 s cm2eq-1 respectively at 250C.The equivalent conductance of 1M CH3COOH is 19.55 The pH of soln=?? pka=4.74
Ans.1.3

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ajoy abcd ·

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