CH-108

pH scale

Chemistry · Secondary 3 · Hard · pH scale

A solution of hydrochloric acid has pH 2. Another solution of sodium hydroxide has pH 13. Which statement about the hydrogen ion concentration, \[H^+]

, is correct?

Both solutions have the same $[H^+]$ .
The acid has 11 times more $H^+$ than the alkali.
The alkali has $10^{11}$ times more $H^+$ than the acid.
The acid has $10^{11}$ times more $H^+$ than the alkali.

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