Also KE where k boltzmann constant T temperature. The concentration and volume of both sodium thiosulphate solution and sulphuric acid are kept constant in each set of the experiment. Section 13 3 The Rate Of A Reaction The effect of increasing collision frequency on. . This can be answered by Arrhenius equation. An increase in temperature increases the rate constant and hence the rate. Even where it is approximately true it may be that the rate doubles every 9C or 11C or whatever. In order to illustrate the dominance of the effect of temperature change on the reaction rate consider a reaction in which the temperature of the system is raised from 310C to 400C. The reaction rate decreases. When temperature increases the amount of atomic or molecular collisions between molecules increases. You mustnt take this too literally. The reaction rate increases. K A e E a R T. T Temperature in absolu...