Question

Can you store \[{\text{CuS}}{{\text{O}}_{\text{4}}}\] solution in zinc pot

Answer 1

Hint:When one element has replaced or removed another element to form a new compound that is known as displacement reaction. \[{\text{CuS}}{{\text{O}}_4}\] stored means the composition of \[{\text{CuS}}{{\text{O}}_4}\] shouldn’t be changed or it must be long lasting.

Complete step by step answer:
Copper sulphate solution can’t be store in zinc pot as zinc is more reactive than copper because the standard reduction potential \[{\text{(}}{{\text{E}}^{\text{0}}})\] value of copper is more than that of zinc.
i.e. \[{\text{Z}}{{\text{n}}^{{\text{ + 2}}}}{\text{/Zn = - 0}}{\text{.76V}}\] and \[{\text{C}}{{\text{u}}^{ + 2}}{\text{/Cu = 0}}{\text{.34}}\]
Here we can see that the \[{\text{C}}{{\text{u}}^{{\text{2 + }}}}\] has higher reduction potential than \[{\text{Z}}{{\text{n}}^{{\text{2 + }}}}{\text{.}}\] \[{\text{Zn}}\] has higher oxidation potential so, it will go easily \[{\text{Zn }} \to {\text{ Z}}{{\text{n}}^{2 + }}\]
There will be the reaction, \[{\text{Zn + CuS}}{{\text{O}}_4} \to {\text{ Cu + ZnS}}{{\text{O}}_4}\]
In this reaction, zinc has displaced another element copper, from copper sulphate solution. Therefore, we cannot store it.

Additional information:
Reduction potential: reduction means gain of electrons, when an atom or element gains an electron then we can say as a result the element is reduced.
Oxidation potential: oxidation means loss of electrons, when an atom or element loses their electron then we can say as a result element is oxidized.
Greater the reduction potential of an ion, more easily it is reduced and vice versa. For example, in Daniel cell, \[{\text{C}}{{\text{u}}^{{\text{2 + }}}}\] is reduced due to greater reduction potential than \[{\text{Zn}}\], which is oxidized.
At anode: oxidation
\[{\text{Zn(s) }} \to {\text{ Z}}{{\text{n}}^{{\text{ + 2}}}}{\text{ + 2}}{{\text{e}}^{\text{ - }}}\]
At cathode: reduction
\[{\text{C}}{{\text{u}}^{{\text{ + 2}}}}{\text{ + 2}}{{\text{e}}^{\text{ - }}} \to {\text{Cu(s)}}\]

Note:
The main component in the battery is copper sulphate. Chemistry inside of a battery is called electrochemistry because it involves reaction that produces or consumes free electrons. Specially they are oxidation or redox reactions, the ones where electrons are exchanged.