alleryStart learning →What name is given to the instantaneous rate of a reaction at the moment the reaction commences?
AThe average rate of the reaction
BThe initial rate of the reaction
CThe integrated rate of the reaction
DThe terminal rate of the reaction
Answer & Solution
Correct answer: B. The initial rate of the reaction
1. An instantaneous rate is the rate at one specific moment, read from the tangent to the concentration curve.
2. Taken at the very start of the reaction, that instantaneous rate is called the initial rate.
3. The average rate instead spans a whole time interval, so it is not tied to the starting instant.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 12 "Kinetics", section 12.1 Chemical Reaction Rates_
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