Calculate the pH

Rank the following in terms of acidity: HClO, IOH, and HBrO. Explain the trend.

Rank the following in terms of acidity: HClO, HClO$_2$, HClO$_3$, HClO$_4$. Explain the trend.

Compare the concentration of H$_3$O$^+$ in 1 M and 2 M solutions of HC$_2$H$_3$O$_2$, K$_a$ = 1.8 x 10$^{-5}$. (doubling the concentration results in an increase of hydronium ions by what factor?)

A solution contains 0.5 M KOH and 0.75 M Cs(OH)$_2$, calculate the pOH of the solution