Question

Experment-1:

(a)To observe the action of Zn, Fe, Cu and Al metals on the aqueous solutions the following salts: i.ZnSO4 ii.FeSO4 iii.CuSO4 iv.Al2(SO4)3

(b)Arrange Zn, Fe, Cu and Al in the decreasing order of their reactivity on the basis of the above results.

Answer 1

Explanation:

(a) i) Zn+ Znso4-----> Zn+ZnSO4( Will remain unchanged).

Fe+ ZnSO4-----> ZnSO4+ Fe(will remain unchanged)

Cu+ZnSO4-----> ZnSO4+ Cu(will reamin unchanged)

2Al+ 3ZnSO4-------> Al2(SO4)3 + 3Zn

ii) FeSO4+ Zn----> ZnSO4+ Fe

FeSO4+ Fe-----> FeSO4+ Fe(will remain unchanged).

FeSO4+Cu----> FeSO4+ Cu(will remain unchanged).

3FeSO4+ 2Al-----> Al2(SO4)3+3 Fe

iii) CuSO4+ Zn----> ZnSO4+Cu

CuSO4+ Fe------> FeSO4+ Cu

CuSO4+ Cu-------> CuSO4+Cu(will remain unchanged).

2CuSO4+ 2Al--------> Al2(SO4)3+ 3Cu

iv) Al2(SO4)3+ Zn------> Al2(SO4)3+ Zn(will remain unchanged).

Fe+ Al2(SO4)3-------> Al2(SO4)3+ Fe(will remain unchanged).

Cu+ Al2(SO4)3-------> Al2(SO4)3+ Cu(will remain unchanged).

Al+ Al2(SO4)3----------> Al+ Al2(SO4)3(will remain unchanged).

(b) Al, Zn, Fe, Cu.