pH of a 1000cc solution is 2. It will not change if

If two solutions of same $\text{pH}$ are mixed, no change in $\text{pH}$ is observed. $\text{pH}$ of water will be $\text{7,}$ that of $\text{100}\text{cc}$ of $\text{0}\text{.1}\text{M}\text{HCl}$ and $\text{1}\text{cc}$ of $\text{0}\text{.1}\text{M}\text{HCl}$ will be $\text{1}$ (as $H^{+}$ concentration is $\text{0}\text{.1}$ )
$\text{0}\text{.01}\text{N}\text{HCl}$ has also $pH = 2$.
So adding this to a $1000cc$ solution of $\text{pH}\text{2}$ will not make any difference in $pH$