Question

The same mass of calcium powder was reacted with different volumes and concentrations of nitric acid (HNO3) in four different experiments.

Which nitric acid (HNO3)
solution would give the fastest initial rate of reaction?

A. 90cm of 0.4mol/dm3

B. 80cm of 0.4mol/dm?

C. 60cm of 0.5mol/dm3

D. 40cm of 0.5mol/dm 3



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Answer 1

This is an introduction to some of the experimental methods used in school laboratories to find orders of reaction. There are two fundamentally different approaches to this: investigating what happens to the initial rate of the reaction as concentrations change, and following a particular reaction to completion and processing the results from that single reaction.