Calculate the concentrations of h2so4, hso4- and h+ ions in a 0.14 mol l aqueous sulfuric acid solution at 25°c. the acidity constants are ka, 1 = and ka.2 = 0.013. [6 marks] (0) 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 mark] (i) how long will it take until 99% of the reactant have reacted? a galvanic cell has the following cell reaction: (c) dy (s) + 2 zn2+ (aq) → 2 zn (s) + dy+ (aq) ecell = 0.18 v (1) is this reaction spontaneous? which equation allows you to decide this? [1 mark] (ii) which compound is the anode? write the half reaction. [2 marks] (ili) what is the standard potential of the dy**/dy redox couple if the standard potential of the zn2+izn couple is -0.76 v? [2 marks] ch4 and h2o were mixed in a 0.64 l reactor at 1800 k. steam reforming took place according to: (d) ch4 (g) + h2o(g) = co (g) + 3 h2 (g) the equilibrium constant for this reaction is k = 0.28. at equilibrium, the reactor contained 0.36 mol of co, 0.081 mol of h2 and 0.051 mol of ch4. what is the concentration of h20 at equilibrium?