A 0.010 M aqueous solution of a weak acid HA has a pH of 4.0. What is the degree of ionization of HA in the solution

Explanation:

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In this case, given the pH of the weak acid HA, we can obtain the concentration of hydrogen in the solution as shown below:

In such a way, the degree of ionization () is computed as:

Whereas is 0.010 M and the acid dissociation constant is:

Thus, solving for , we obtain:

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