The $pH$ value of a $\frac{N}{10} \ NaOH$ solution is:

Calculate the $pH$ of a $0.37 \ g$ $Ca(OH)_2$ solution in $200 \ mL$ of water. (Atomic masses: $Ca = 40, O = 16, H = 1$)

$50 \ mL$ of $H_2O$ is added to $50 \ mL$ of $1 \times 10^{-3} \ M$ barium hydroxide solution. What is the $pH$ of the resulting solution?

The $pH$ of a $0.05 \,M$ solution of a strong dibasic acid $(H_2A)$ is:

Which of the following will decrease the $pH$ of a $50 \ mL$ solution of $0.01 \ M \ HCl$?

Assuming complete dissociation,calculate the $pH$ of the following solutions:
$(i) \ 0.003 \ M \ HCl$
$(ii) \ 0.005 \ M \ NaOH$
$(iii) \ 0.002 \ M \ HBr$
$(iv) \ 0.002 \ M \ KOH$