pH value of 0.001 M NaOH solution is ____________.
Answer (integer)
11
Solution
$$
\begin{aligned}
&{\left[\mathrm{OH}^{-}\right]=0.001=10^{-3} \mathrm{M}} \\\\
&{\left[\mathrm{H}^{+}\right]\left[\mathrm{OH}^{-}\right]=10^{-14}} \\\\
&\quad\left[\mathrm{H}^{+}\right]=10^{-11} \\\\
&\begin{aligned}
\mathrm{pH} &=-\log \left[\mathrm{H}^{+}\right] \\\\
=&-\log \left(10^{-11}\right) \\\\
\mathrm{pH} &=11
\end{aligned}
\end{aligned}
$$
About this question
Subject: Chemistry · Chapter: Equilibrium · Topic: Chemical Equilibrium and Kc, Kp
This question is part of PrepWiser's free JEE Main question bank. 67 more solved questions on Equilibrium are available — start with the harder ones if your accuracy is >70%.