p H = p K a + log ⁡ ( [ base ] [ acid ] ) {\displaystyle \mathrm {pH} =\mathrm {p} K_{\mathrm {a} }+\log \left({\frac {[{\mbox{base}}]}{[{\mbox{acid}}]}}\right)} p H = p K a + log ⁡ ( 1 ) {\displaystyle \mathrm {pH} =\mathrm {p} K_{\mathrm {a} }+\log(1)\,} p H = p K a {\displaystyle \mathrm {pH} =\mathrm {p} K_{\mathrm {a} }\,}