Question

Which of the following is a product when a solution of MgCl2(aq) is mixed with a solution of Pb(NO3)2(aq)?

a. PbCl2(aq)
b. PbCl2(s)
c. Pb(NO3)2(s)
d. MgCl2(s)
e. Mg(NO3)2(s)

Answer 1

Answer: The product formed in the solution is
`PbCl_2(s)`

Step-by-step explanation:

Double displacement reaction is defined as the reaction in which exchange of ions takes place.

`AB+CD\rightarrow AD+CB`

The chemical equation for the reaction of magnesium chloride and lead nitrate follows:

`MgCl_2(aq.)+Pb(NO_3)_2(aq.)\rightarrow PbCl_2(s)+Mg(NO_3)_2(aq.)`

By Stoichiometry of the reaction:

1 mole of aqueous magnesium chloride reacts with 1 mole of aqueous lead nitrate to produce 1 mole of solid lead chloride and 1 mole of aqueous magnesium nitrate

Hence, the product formed in the solution is
`PbCl_2(s)`