Question

What is the mass-action expression Qc for the following chemical reaction:Zn(s)+2Ag+(aq) ⇌ Zn+2(aq)+2Ag(s) a. [Zn-2]/[Ag-]b. [Zn-2][Ag(s)]^2/[Zn(s)][Ag-]^2c. [Ag-]^2/[Zn2-]d. [Zn(s)][Ag-]^2/[Zn2-][Ag(s)]^2e. [Zn2-]/[Ag-]^2

Answer 1

Answer : The expression for reaction quotient will be :

$Q_c=\frac{[Zn^{2+}]}{[Ag^{+}]^2}$

Explanation :

Reaction quotient (Qc) : It is defined as the measurement of the relative amounts of products and reactants present during a reaction at a particular time.

The given redox reaction is :

$2Ag^{+}(aq)+Zn(s)\rightarrow 2Ag(s)+Zn^{2+}(aq)$

In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.

The expression for reaction quotient will be :

$Q_c=\frac{[Zn^{2+}]}{[Ag^{+}]^2}$