A 0.100 M solution of an acid, HA, has a pH = 2.00. What is the value of the ionization constant, Ka for this acid?

Explanation:

Hello,

In this case, since the ionization of the given HA acid is:

The equilibrium expression is:

Whereas the concentration of hydrogen ions is compute from the pH=

Which also equals the concentration of and the in general the ionization extent, therefore, the acid ionization constant, Ka, turns out:

Regards.

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because it does not have the potential to be entirely used up