When the concentration of the weak acid is the same as the concentration of the conjugate base, the pH will be equal to the pKa of the weak acid. This is because from the Henderson Hasselbalch eq:pH = pKa + log [acid]/[conj.base] and when [acid] = [conj.base], the log of 1 = 0 and pH = pKa.
The slope of the tangent line at .050M hypochlorite ions is .0032M/S. This rate is much lower than the rate calculated in part d. In general, the more concentrated a solution the higher the reaction rate and because the concentration of hypochlorite ions is the same in both reactions this reaction must have a lower concentration of iodine ions than the reaction in part d.
The slope of the tangent line at .050M hypochlorite ions is .0032M/S. This rate is much lower than the rate calculated in part d. In general, the more concentrated a solution the higher the reaction rate because the concentration of hypochlorite ions is the same in both reactions this reaction must have a lower concentration of iodine ions than the reaction in part d.