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

Multiple Choice

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