Question

You are provided with two container made up of copper and aluminium you are also provided with solutions of dilute HCl , dilute HNO3, ZnCl2 and H2O, in which of the above container will this will be kept?

Answer 1

Copper container:
1.HCl can be kept as no reaction takes place due to lower reactivity of copper.
2.HNO3 can be kept as no reaction takes place due to low reactivity of copper than hydrogen.
3. ZnCl2 can be kept as Zn is placed above copper in reactivity series of metal and hence no reaction occurs.
4. H2O can be kept due to the above reasons.
Aluminium container:
1. HCl cannot be kept as aluminium being more reactive than hydrogen displaces it from its solution and reaction occurs.
2. HNO3 cannot be kept as aluminium being more reactive than hydrogen displaces it from its solution and reaction occurs.
3. ZnCl2 cannot be kept as aluminium being more reactive than zinc displaces it from its solution and reaction occurs.
4. H2O:Aluminum does not react with cold or hot water and hence water can be kept in aluminium container.

Answer 2

HERE IS YOUR ANSWER MATE

(A) When solutions are kept in copper container

(i) Dilute HCl, Copper does not react with dilute HCl. Therefore, it can be kept.

(ii) Dilute HNO3, Nitric acid acts as a strong oxidizing agent and reacts with copper vessel, therefore

cannot be kept.

(iii) ZnCl2. Zinc is more reactive than copper (Cu) therefore, no displacement reaction occurs and hence

can be kept.

(iv) H2O, Copper does not react with water therefore it can be kept.

(B) When solutions are kept in aluminium containers

i) Dilute HCI, Aluminium reacts with dilute HCl to form its salt and hydrogen is evolved. Therefore,

cannot be kept. 2Al + 6HCl → 2AICl3 + 3H2.

(ii) Dilute HNO3, Aluminium gets oxidised by dilute HNO3 to form a layer of Al2O3 and cannot be kept.

(iii) ZnCI2, Aluminium being more reactive than zinc can displace zinc ion from the solution. Therefore,

the solution cannot be kept. 2Al + 3ZnCl2 → 2AlCl3+ 3Zn

(iv) H2O, Aluminium does not react with cold or hot water. Therefore, water can be kept while

aluminium is attacked by steam to form aluminium oxide and hydrogen

2Al(s) + 3H2O(g) → Al2O3(s) + 3H2(g).