The following terminologies and concepts are pertinent in the understanding of the topic “Reaction Kinetics” in STPM Form 6. The concepts are rather straight-forward. Berry Berry Teacher believes that students should have minimal problems with mastering the basics of the topic if they can understand the following terminologies and concepts below. Try to understand this first, before moving on to the harder aspect of the topic, namely the “graphs”. More will be posted on interpreting and understanding graphs related to this topic. So for now, try to understand this.
STPM Form 6 – Terminology and Concepts: Reaction Kinetics
Rate of reaction is the change of concentration of a reactant or a product per unit time (seconds / minutes).
Rate of reaction = rate of increase of the concentration or amount of the product / Rate of reaction = rate of decrease of the concentration or amount of the reactant.
Average rate is the change in concentration of a substance (reactant or product) over a fixed time interval.
Instantaneous rate is the rate of the reaction at a specific time (the steeper the slope, the higher the instantaneous rate).
Tangent is zero, the rate is zero / reaction has stopped.
Rate Equation or Rate Law is the rate of a reaction which is affected by the reactants concentration.
Rate = k [reactant]n , k is rate constant