Final answer:
The factors to consider are the final concentration of reactants, temperature changes, initial concentration of reactants, and catalyst presence.
Step-by-step explanation:
When explaining the answer to question 2d, the factors to consider are:
a) Final concentration of reactants: The final concentration of reactants may increase or decrease depending on the reaction. If a reaction is exothermic, increasing the temperature will cause the reactants to decrease in concentration, while a decrease in temperature will cause an increase in concentration. The opposite will occur for an endothermic reaction.
b) Temperature changes: Increasing the temperature generally increases the rate of a reaction, while decreasing the temperature decreases the reaction rate. This is due to the fact that higher temperatures provide more energy for particles to collide and react.
c) Initial concentration of reactants: The initial concentration is the starting point of the reaction. If the concentration of reactants is higher at the beginning, the reaction rate will be faster.
d) Catalyst presence: Catalysts increase the rate of a reaction without being consumed. They provide an alternative pathway with lower activation energy, allowing more reactant particles to effectively collide and react.