The pH of a solution is given by the formula $\mathrm { pH } = - \log \left[ \mathrm { H } ^ { + } \right] , \text {where } \left[ \mathrm { H } ^ { + } \right]$ is the concentration of hydrogen ions in moles
per liter in the solution. Use this formula to
-The pH value of a substance is 5.42 . Find the hydrogen-ion concentration for this substance.
A) 0.2
B) 263,026.8
C) 1.7
D) 0.0000038

Question

Quizplus · Accepted Answer

The concentration of hydrogen ions $[H^+]$ can be found by rearranging the pH formula to $[H^+] = 10^{-\text{pH}}$. Substituting the given pH value of 5.42, we get $[H^+] = 10^{-5.42} = 0.0000038$ moles per liter.

The PH of a Solution Is Given by the Formula pH=−log⁡[H+],where [H+]\mathrm { pH } = - \log \left[ \mathrm { H } ^ { + } \right] , \text {where } \left[ \mathrm { H } ^ { + } \right]pH=−log[H+],where [H+]

The PH of a Solution Is Given by the Formula $\mathrm { pH } = - \log \left[ \mathrm { H } ^ { + } \right] , \text {where } \left[ \mathrm { H } ^ { + } \right]$