Describe and explain the effect on the rate of reaction of: (a) changing the concentration of solutions (b) changing the pressure of gases (c) changing the surface area of solids (d) changing the temperature (e) adding or removing a catalyst, including enzymes using collision theory

Describe the neutralisation reaction between an acid and an alkali to produce water, ( H^+(aq) + OH^- (aq) ightarrow H_2O (l) )