Question

Which metallic spoon can be used to stir lead nitrate solution?

Answer 1

Hint :We know that the lead nitrate can be obtained by the thermal decomposition of a metal nitrate solution. This is followed by presence of a strong acid acting as a dehydrating agent to produce residual product of lead nitrate solution.

Complete Step By Step Answer:
Higher the value of reduction potential of an element can displace the element having low value of reduction potential. To get the solution we have to understand the electrochemical series. To get the solution of the above mentioned question we have to first understand about the electrode, electrode potential and electrochemical series. Electrode: an electrode is an electrical conductor used to make contact with a nonmetallic part of a circuit. They are used to provide current through nonmetal objects to alter them in numerous ways. There are two types of electrode, cathode and anodes.
Cathode attracts the positively charged action. Anode attracts negatively charged anions. Electrode potential: electrode potential is the electromotive force of a galvanic cell built from a standard reference electrode and another electrode to be characterized. Electrochemical series: it is referred to as activity series is a list that describes the arrangement of elements in order of their increasing electrode potential value .the series has been established by measuring the potential of various electrode versus standard hydrogen electrode in series, all reduction potential are given on hydrogen scale whose is taken as zero. Silver is less reactive than lead, so there will be no displacement reaction.

Note :
Remember that copper metal is more reactive than silver metal thus, when copper spoon is kept immersed in silver nitrate solution for some time, it displaces silver from silver nitrate solution. The grey solid crystal of silver metal is seen growing on the copper spoon and the solution turns blue in colour.