# a) Explain what is meant by a weak acid. b) Identify the weakest acid in the table above. c)...

## Question:

The table below shows the values of the acid dissociation constant, Ka_(T) for three acids.

{eq}\begin{array}{c|c|c} \hline \text{Name}&\text{Formula}& Ka_{(T)}/\text{mol-dm}^{-3} \\ \hline \text{Methanoic acid}&HCO_2H&1.60 \times 10^{-4}\\ \text{Ethanoic acid}&CH_3CO_2H&1.73 \times 10^{-5} \\ \text{Carbonic acid}&H_2CO_3&4.3 \times 10^{-7} \\ \hline \end{array} {/eq}

a) Explain what is meant by a weak acid.

b) Identify the weakest acid in the table above.

c) Calculate the {eq}Kp_{ (T)} {/eq} of ethanoic acid.

## Acid and Their Strength:

According to the Bronsted-Lowry concept, acid is a substance that donates or losses protons example- HCl.

The strength of the acid can be determined by its ability to dissociate in water to lose protons. Thus, acidic strength can be determined by its dissociation constant.

## Answer and Explanation: 1

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a) Any acid is said to be weak if it does not dissociate completely in the aqueous solution. As they do not dissociate completely in the aqueous...

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