Solve the Problem $\left. \mathrm { H } ^ { + } \right]$

Multiple Choice

Solve the problem.
-Find the hydrogen ion concentration of a solution [ $\left. \mathrm { H } ^ { + } \right]$ whose $\mathrm { pH }$ is $7.5$ . Use the formula $\mathrm { pH } = - \log \left[ \mathrm { H } ^ { + } \right]$ .

A) $3.16 \times 10 ^ { 7 }$ moles per liter
B) $- 8.75 \times 10 ^ { - 1 }$ moles per liter
C) $3.16 \times 10 ^ { - 8 }$ moles per liter
D) $8.75 \times 10 ^ { - 1 }$ moles per liter