alleryStart learning →If a reaction is zero order with respect to one reactant, what does that tell you about that reactant?
AThat reactant is completely used up first
BThat reactant must be present as a solid
CThat reactant doubles the rate when doubled
DIts concentration has no effect on the rate
Answer & Solution
Correct answer: D. Its concentration has no effect on the rate
1. A zero order term contributes a factor of concentration raised to the power zero.
2. That factor equals 1 whatever the concentration is.
3. So changing the amount of that reactant leaves the rate untouched.
4. Doubling the rate on doubling the concentration is first order behaviour, not zero order.
5. The reactant still takes part in the chemistry, so it is not simply absent or solid.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 12 "Kinetics", section 12.3 Rate Laws_
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