The $pOH$ of beer is $10.0$. What is the concentration of hydrogen ions $[H^+]$?

In a solution,$pH = 5$. Upon adding more acid,the $pH$ decreases to $2$. The hydrogen ion concentration increases by a factor of:

At $90\,^oC$,pure water has $[H^{+}] = 10^{-6}\,M$. If $100\, mL$ of $0.2\, M\, HCl$ is added to $200\, mL$ of $0.1\, M\, KOH$ at $90\,^oC$,then the $pH$ of the resulting solution will be:

Given that $K_w$ for water is $10^{-13} \ M^2$ at $62 \ ^\circ C$,compute the sum of $pOH$ and $pH$ for a neutral aqueous solution at $62 \ ^\circ C$.

$100 \ mL$ of $NaOH$ solution has a $pH = 10$. Calculate the concentration of hydroxide ions,$[OH^{-}]$.

At a certain temperature,if $pK_w = 12.60$,then which of the following is correct for an acidic solution?