Chapter 18, Problem 18.131P

Interpretation Introduction

Interpretation:

The reason has to be explained for $\text{HF}$ is weak acid and other hydrohalic acids are strong acid in water whereas all the hydrohalic acids are equally strong in ammonia.

Concept Introduction:

Acids:

Acid release hydrogen ion in water.

  $\text{HCl(aq) }\to {\text{H}}^{\text{+}}{\text{(aq) + Cl}}^{\text{-}}\text{(aq)}\mathrm{.........}\text{Acid}$

An acid is a substance that produces hydronium ions, ${\text{H}}_{\text{3}}{\text{O}}^{\text{+}}$ when dissolved in water.

A solution may be acidic and basic depends on relative strength of anions as an acid or base. Anions and cations can be acidic, basic and netural. Acidic have $\text{pH < 7}$, basic have $\text{pH > 7}$ and netural have $\text{pH=7}$ and water $\text{pH is 7}$.