Which of the Following Mathematical Expressions Is the Henderson-Hasselbalch Equation $\mathrm { p } K _ { \mathrm { a } } = \mathrm { pH } + \log \left( \frac { [ \text { conjugate base } ] } { [ \text { acid } ] } \right)$

Multiple Choice

Which of the following mathematical expressions is the Henderson-Hasselbalch equation?

A) $\mathrm { p } K _ { \mathrm { a } } = \mathrm { pH } + \log \left( \frac { [ \text { conjugate base } ] } { [ \text { acid } ] } \right)$
B) $\mathrm { pH } = \mathbf { p } K _ { \mathrm { a } } + \log \left( \frac { \left[ \mathrm { OH } ^ { - } \right] } { \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right] } \right)$
C) $\mathrm { pH } = \mathrm { p } K _ { \mathrm { a } } + \log \left( \frac { [ \text { acid } ] } { [ \text { conjugate base } ] } \right)$
D) $\mathrm { p } K _ { \mathrm { a } } = \mathrm { pH } + \log \left( \frac { \left[ \mathrm { OH } ^ { - } \right] } { \left[ \mathrm { H } _ { 3 } \mathrm { O } ^ { + } \right] } \right)$
E) $\mathrm { pH } = \mathbf { p } K _ { \mathrm { a } } + \log \left( \frac { [ \text { conjugate base } ] } { [ \text { acid } ] } \right)$