PDF chapter test TRY NOW
Write a long answer to the following questions:
You are provided with two containers made up of copper and aluminium. You are also provided with solutions of dilute \(HCl\), dilute \(HNO_3\), \(ZnCl_2\) and \(H_2O\). In which of the above containers these solutions can be kept?
When keeping solutions in a copper container:
Dilute \(HCl\): With dilute \(HCl\), copper . As a result, dilute \(HCl\) may be kept in a copper container.
Dilute \(HNO_3\): When copper reacts with dilute \(HNO_3\), copper nitrate and nitrogen monoxide gas are formed.
\(3Cu\) + \(8HNO_3\) → + \(2NO\) + \(4H_2O\)
Therefore, dilute \(HNO_3\) cannot be kept in a copper container.
\(ZnCl_2\) solution: Copper does not displace zinc from \(ZnCl_2\) solution because it is than \(Zn\).
Hence, \(ZnCl_2\) solution can be stored in a copper container.
\(H_2O\) Water: Copper and water do not react. As a result, water may be kept in a copper container.
A copper container can be used to store diluted \(HCl\), \(ZnCl_2\) solution, and \(H_2O\).
When keeping solutions in a aluminium container:
Dilute \(HCl\): When aluminium reacts with dilute \(HCl\), it forms aluminium chloride and hydrogen gas.
\(2Al\) + \(6HCl\) →
As a result, dilute HCl cannot be kept in an aluminium container.
Dilute \(HNO_3\): Aluminium forms aluminium oxide when it reacts with dilute \(HNO_3\). The aluminium oxide layer any further after it has formed. Hence, dilute \(HNO_3\) can be stored in an aluminium container.
\(ZnCl_2\) solution: \(ZnCl_2\) solution combines with \(Al\) and forms aluminium chloride and zinc \(Zn\) metal.
\(3ZnCl_2\) + \(2Al\) →
Therefore, \(ZnCl_2\) solution cannot be stored in aluminum container.
\(H_2O\) Water: Aluminum and water (cold as well as hot water) do not react.
Therefore, water can be stored in aluminium container.
Dilute \(HNO_3\) and \(H_2O\) can be stored in an aluminium container.
Register for free to see more content