Ka Acid

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.

The percent ionization of NH$_3$ is found to be 4.2% in a solution, find the concentration of NH$_3$.

NH$_3$ (aq) + H$_2$O $\leftrightharpoons$ NH$_4^+$ + OH$^-$ , K$_b$ = 1.8 x 10$^{-5}$

Lactic acid, HC$_3$H$_5$O$_3$, is a waste product that accumulates in muscle during exertion, leading to pain and a feeling of fatigue. In a 0.100 M aqueous solution, lactic acid is 3.7% dissociated. Calculate the value of K$_a$ for this reaction.