Calculate the concentrations of h2so4, hso." and h ions in a 0.14 mol l aqueous sulfuric acid solution at 25°c. the acidity constants are kat " and k2 = 0.013. [6 marks] (b) (1) 600 s after initiation of a first order reaction 48.5% of the initial reactant concentration remains present. what is the rate constant for this reaction? [2 marks] (1) how long will it take until 99% of the reactant have reacted?