Chapter 17, Problem 17.71QP

Interpretation Introduction

Interpretation:

The precipitation of $\text{Fe}{\left(\text{OH}\right)}_{\text{2}}$ occurs or not while the given solutions mixed has to be explained.

Concept introduction:

• Reaction quotient (Q) is the ratio of product of concentration of products  to that of  product of concentration of reactants, raised to the power of coefficients.
• ${\text{Q > K}}_{\text{sp}}$ , precipitation will happen
• ${\text{Q is less than K}}_{\text{sp}}$, more solute can dissolve in solution.
• ${\text{Q is equal to K}}_{\text{sp}}$, no more solute can dissolve or precipitate in solution.

To calculate: The concentration of ammonia and predict whether precipitate forms or not.