Chapter 16, Problem 16.28QE

(a)

Interpretation Introduction

Interpretation:

When $\text{50 mL of 0}\text{.4 M HBr and 50 mL 0}\text{.2 M NaOH}$ are mixed, the pH of the solution has to be estimated.

Concept introduction:

Estimating the pH of Mixtures of Acids and Bases:

If $H_3{O}^{+}$ ion is present in the solution the pH of the solution is $\text{1}$. If ${\text{OH}}^{\text{-}}$ ion is present in the solution the pH of the solution is $\text{14}$.

If $H_3{O}^{+}$ ion concentration is equal to ${\text{OH}}^{\text{-}}$ concentration, the solution neutral and the pH of the solution is $7$.

(b)

Interpretation Introduction

Interpretation:

When $\text{100 mL of 0}\text{.4 M HBr and 50 mL 0}\text{.2 M NaOH}$ are mixed, the pH of the solution has to be estimated.

Concept introduction:

Refer to part (a)

(c)

Interpretation Introduction

Interpretation:

When $\text{150 mL of 0}\text{.4 M HBr and 100 mL of 0}{\text{.4 M Ba(OH)}}_{\text{2}}$ are mixed, the pH of the solution has to be estimated.

Concept introduction:

Refer to part (a)

(d)

Interpretation Introduction

Interpretation:

When $\text{200 mL of 0}\text{.4 M HBr and 100 mL of 0}{\text{.4 M Ba(OH)}}_{\text{2}}$ are mixed, the pH of the solution has to be estimated.

Concept introduction:

Refer to part (a)