Question

True or false; There are no H3O+ ions in a neutral solution.

Answer 1

A neutral solution has a pH equal to 7. We can apply the definition of pH to find the concentration of H3O+ ions. The equation that describes pH is:

$pH=-log\lbrack H_3O^+\rbrack$

If we clear the concentration of H3O+ ions we have:

$\lbrack H_3O^+\rbrack=10^{-pH}$

Now, we replace the pH equal to 7:

$\lbrack H_3O^+\rbrack=10^{-7}M$

The concentration of ions H3O+ in a neutral solution is 10^-7M. so the statement is false.

Answer: False