Question

Give reasons
1. During electro refining of copper aqueous copper sulphate is acidified With dilute acid

2. Na and K are generally not refined by electrolytic method

Answer 1

1.it is done because due to presence of acid the copper sulphate dissociates into cu and so4 ions
2.because Na and k are extracted from electrolytic method and metals extracted by this method are generally very pure.....