1.

1. Is it possible to keep copper sulphate solution in zinc pot? Why? 2. Assign oxidation numbers of the underlined elements. (i) NaH2 PO4 (ii) NaHSO4

Answer»

1. No. Zn being more reactive will displace Cu from CuSO4 . Thus Cu will be deposited on the vessel.

2. (i) NaH2 PO4 

+1 +(+1 × 2) + x +(-2 × 4) = 0 

1 + 2 + x – 8 = 0 

x – 5 = 0 

x = +5

(ii) NaHSO4

+1 + 1 + x +(-2 × 4) = 0 

+1 + 1 + x – 8 = 0 

x – 6 = 0 

x = +6



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