kanbehs succ

g) (i) State ‘Le Chatelier’s principle’.
(ii) Using Le Chatelier’s principle, predict the effect of increasing pressure on the following equilibrium.
N2(g) + 3H2(g) ⇋ 2NH3(g)
(h) (i) Describe the elements required by plants.
(ii) Give the monomer structure and uses of PS.

1. Answer any FOUR questions. (32 marks)
   (a) (i) Define buffer solution.
   (ii) Calculate the pOH of a buffer solution containing 0.2 mole of ethanoic acid (pKa=3.8) and 0.05 mole
   of sodium ethanoate per 200 cm3 of solution.