alleryStart learning →What defines a heterogeneous catalyst?
AIt is in the same phase as the reactants
BIt is in a different phase, usually a solid
CIt is always dissolved in the reaction mixture
DIt is always a gas mixed with the reactants
Answer & Solution
Correct answer: B. It is in a different phase, usually a solid
1. A heterogeneous catalyst is in a different phase from the reactants and is usually a solid.
2. It works by offering an active surface for the reaction to happen on.
3. Gas and liquid reactions then occur on that surface rather than out in the bulk.
4. Anything dissolved in the same solution as the reactants would be homogeneous, not heterogeneous.
_Source: OpenStax Chemistry (CC BY 4.0), Ch 12 "Kinetics", section 12.7 Catalysis_
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