The equation for the pH of a substance is $pH =-\log \left[ H ^{+}\right]$, where $H ^{+}$ is the concentration of hydrogen ions. Which equation models the concentration of hydrogen ions ($H ^{+}$) of a solution whose pH is 7.2?
A$\left[H^{+}\right]=\log 7.2$
B$\left[ H ^{+}\right]=-\log 7.2$
C$\left[ H ^{+}\right]=10^{7.2}$
A$\left[H^{+}\right]=\log 7.2$
B$\left[ H ^{+}\right]=-\log 7.2$
C$\left[ H ^{+}\right]=10^{7.2}$