Chapter 16, Problem 16.48QE

(a)

Interpretation Introduction

Interpretation:

A $\text{50 mL of 0}\text{.1 M HF and 50 mL of 0}\text{.2 M NaOH}$ are mixed, pH of the solution has to be estimated.

Concept introduction:

For estimating the pH range (weak acid with strong base) is given as follows,

In the initial point of the pH is three in a chemical system of weak acid, the pH range will be 2 to 5.

If the solution is acid buffer, pH is four in a chemical system of weak acid, the pH range will be 3 to 6.

In equivalent point of weak acid, pH is ten in a chemical system of weak acid, the pH range will be 8 to 11.

If the hydroxide ion is excess, pH is thirteen in a chemical system of weak acid, the pH range is approaches the titrant value.

(b)

Interpretation Introduction

Interpretation:

A $\text{100 mL of 0}\text{.1 M HF and 50 mL of 0}\text{.2 M NaOH}$ are mixed, the pH of the solution has to be estimated.

Concept introduction:

Refer to part (a)

(c)

Interpretation Introduction

Interpretation:

A $\text{150 mL of 0}\text{.1 M HF and 50 mL of 0}{\text{.2 M Ba(OH)}}_{\text{2}}$ are mixed, the pH of the solution has to be estimated.

Concept introduction:

Refer to part (a)

(d)

Interpretation Introduction

Interpretation:

A $\text{200 mL of 0}\text{.1 M HF and 50 mL of 0}{\text{.2 M Ba(OH)}}_{\text{2}}$ are mixed, the pH of the solution has to be estimated.

Concept introduction:

Refer to part (a)