Final answer:
The order of reaction can be determined based on the observations provided: a. First-order reaction b. First-order reaction c. Second-order reaction.
Step-by-step explanation:
The order of reaction can be determined based on the following observations:
- When the half-life of a reaction gets shorter as the initial concentration is increased, it suggests a first-order reaction.
- If a plot of the natural log of the reactant concentration versus time yields a straight line, it indicates a first-order reaction.
- When the half-life of a reaction gets longer as the initial concentration is increased, it suggests a second-order reaction.
Therefore, the order of reaction for each observation is as follows:
a. First-order reaction
b. First-order reaction
c. Second-order reaction