alleryStart learning →What does a rate law describe?
AHow the rate depends on the total pressure
BHow the rate changes as products build up
CHow the rate depends on reactant concentrations
DHow the rate depends on the vessel material
Answer & Solution
Correct answer: C. How the rate depends on reactant concentrations
1. A rate law is written as rate = k[A]^m[B]^n and so on.
2. The square brackets hold the molar concentrations of the reactants.
3. So the rate law states how the rate depends on those reactant concentrations.
4. Products do not appear in an ordinary rate law, and the vessel material is not part of it at all.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 12 "Kinetics", section 12.3 Rate Laws_
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