Problem

A laboratory rinse solution has a measured pH of

3.27

. What is

[H_3O^+]

for the solution, expressed with the correct number of significant figures? a)

5.4\times10^{-3}\,\text{M}

5.0\times10^{-4}\,\text{M}

5.4\times10^{-4}\,\text{M}

1.9\times10^{-4}\,\text{M}