Please do A,B,C and D

Use Le Chatelier's principle to predict the effect of the following stresses on the given equilibria. (5 Marks) a) The addition of a small volume of HCl(aq) to an NH4* /NH3 buffer NH4+ ++ H+ + NH3 b) The addition of NaOH to a phenolphthalein indicator solution (HPh(aq)); HPh(aq) H*(aq) + ph (aa) c) The addition of heat to the following reaction: NH4Cl(s) NH4 (aq) + Cl" (aa) AH = + 45 kJ/mol d) The addition of siver nitrate (AgNO3) to a solution of acetic acid HC2H302(aq) H+ (aq) + CH302