pH=−log[H+]\mathrm{pH}=-\log \left[\mathrm{H}^{+}\right]pH=−log[H+]
pH=−log[H]\mathrm{pH}=-\log \left[\mathrm{H}^{}\right]pH=−log[H]
pH=−log[H++]\mathrm{pH}=-\log \left[\mathrm{H}^{++}\right]pH=−log[H++]
pH=log[H+]\mathrm{pH}=\log \left[\mathrm{H}^{+}\right]pH=log[H+]
