You dispose of a $0.200\;M$ solution of $H_3C_6H_5O_7$
(citric acid, $K_a$ $=$ $3.5\cdot 10^{-4}$)
Equilibrium of hydrolysis:
$H_3C_6H_5O_7$ $+$ $H_2O$
$H_3O^+$ $+$ $H_2C_6H_5O_7^-$
Identify the initial concentrations (without $H_2O$):
a) $0.200\;M$, $0\;M$, $0.200\;M$ b) $0\;M$, $0.200\;M$, $0.200\;M$ c) $0.200\;M$, $0\;M$, $0\;M$ d) $0.200\;M$, $0.200\;M$, $0.200\;M$
Initial concentrations: c) $0.200\;M$, $0\;M$, $0\;M$