Question

Zinc reacts with cuso4 according to the equation zn+cuso4----> znso4+cu.if excess of zinc is added to 100 ml of 0.05 m cuso4 the amount of copper formed

Answer 1

Zn  +  CuSO4  ------------------>  ZnSO4  +  Cu

The above equation is balanced, so 1 mole of CuSO4 will give us 1mole of Cu.
Hence the number of moles of CuSO4 taken is equal to number of moles of copper formed.

moles of CuSO4 = molarity x volume(in litres)
                           =  0.05 x 0.1
                           = 0.005 = number of moles of copper formed
The amount of copper formed= 0.005 x 63.5
                                                =0.3175 grams