# Problem: How many moles of H3O+ or OH− must you add to a liter of strong acid solution to adjust its pH from 3.15 to 3.65 ?  Assume a negligible volume change.

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###### FREE Expert Solution

$\overline{)\mathbf{\left[}{\mathbf{H}}_{\mathbf{3}}{\mathbf{O}}^{\mathbf{+}}\mathbf{\right]}{\mathbf{=}}{{\mathbf{10}}}^{\mathbf{-}\mathbf{pH}}}$

pHinitial = 3.15

pHfinal = 3.65

###### Problem Details

How many moles of H3O+ or OH must you add to a liter of strong acid solution to adjust its pH from 3.15 to 3.65 ?  Assume a negligible volume change.