How does a heterogenous catalyst work? (3 marks)
Reactants are adsorbed onto the surface of the catalyst (1). Bonds forms between the atoms and molecules on the surface (2), and the products desorb (3).
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Calculate the concentration, in mol dm-3, of a solution of chloric (I) acid, HOCl , which has a pH of 4.23. Chloric acid is a weak acid, with Ka = 3.72 x 10^-8
Which of Na+ and Mg2+ is the smaller ion. Explain your answer. (2 marks)