The true statement about a substance in which 99.9% of it dissociates to release hydronium ions in its aqueous solution is that: C. It is a strong acid.
What is a strong acid?
A strong acid can be defined as a type of acid that completely dissociates (splits or ionizes) in an aqueous solution, usually by loosing a proton such as hydronium ions.
This ultimately implies that, a strong acid is a substance in which 99.9% of it dissociates in its aqueous solution to release hydronium ions.
In conclusion, some examples of a strong acid include the following;
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