What is the $pH$ of a $NaOH$ solution with a concentration of $0.01 \ g \ L^{-1}$?

$pH$ value of $0.001 \ M \ NaOH$ solution is $..... .$

The solubility of $Sr(OH)_2$ at $298 \, K$ is $19.23 \, g/L$ of solution. Calculate the concentrations of strontium and hydroxyl ions and the $pH$ of the solution.

What is the $pH$ of a solution containing $5 \times 10^{-4} \text{ M } H^+$ ions?

Given that the dissociation constant for $H_2O$ is $K_w = 1 \times 10^{-14} \ mol^2/L^2$. What is the $pH$ of a $0.001 \ M$ $KOH$ solution?

$200 \ mL$ of an aqueous solution of $HCl$ $(pH=2)$ is mixed with $300 \ mL$ of aqueous solution of $NaOH$ $(pH=12)$ and is diluted to $1.0 \ L$. The $pH$ of the resulting solution is