Question

Weak acids are usually one of the following: 1. hydrofluoric acid, ____________ , 2. acids in which the proton is not bonded to an oxygen atom or a halogen (ex. ____________ ), 3. ____________ where the number of oxygen atoms equals or only exceeds by ____________ the number of ionizable ____________ (ex. ____________ ) or 4. ____________ (ex. ____________ ).

Answer 1

Answer: 1).  Weak acids are usually one of the following: 1. hydrofluoric acid, $CH_{3}COOH$.

2). Acids in which the proton is not bonded to an oxygen atom or a halogen (ex. HCN ).

3). Oxo-acids where the number of oxygen atoms equals or only exceeds by 1 the number of ionizable protons (ex.$HNO_{3}$) or

4). Carboxylic acids (ex. $CH_{3}COOH$).

Explanation:

Weak acids are the species which partially dissociate into ions when added to water. For example, acetic acid ($CH_{3}COOH$) is a weak acid.

Acids in which the proton is not bonded to an oxygen atom or a halogen is HCN.

Oxo-acids are the acids which contain oxygen atom. For example, $HNO_{3}$, $H_{2}SO_{4}$, R-COOh etc are all oxo-acids.

In oxo-acids, the number of oxygen atoms equals or only exceeds by 1 the number of ionizable protons.

Thus, we can conclude that:

1).  Weak acids are usually one of the following: 1. hydrofluoric acid, $CH_{3}COOH$.

2). Acids in which the proton is not bonded to an oxygen atom or a halogen (ex. HCN ).

3). Oxo-acids where the number of oxygen atoms equals or only exceeds by 1 the number of ionizable protons (ex.$HNO_{3}$) or 4. Carboxylic acids (ex. $CH_{3}COOH$).