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How do you tell if an acid is a strong acid or weak acid?

Answer:
Different acids will have varying levels of strength - the most obvious way to see this is to look at the pH of the acid. That is the lower the pH, the stronger the acid.
The reason behind this is due to the degree of ionisation of the acid in aqueous solution. For example, hydrochloric acid is a strong acid (complete ionisation) whilst acetic acid is weak as it does not ionise completely.
First answer by Porschepunk. Last edit by Little Smurf. Contributor trust: 0 [recommend contributor recommended]. Question popularity: 2 [recommend question].

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