alleryStart learning →A reaction with a very large equilibrium constant reaches equilibrium when:
AAlmost no reactant has reacted
BExactly half has been converted
CNo reaction has taken place
DMost reactant has been converted
Answer & Solution
Correct answer: D. Most reactant has been converted
1. The size of K reports where the balance point sits.
2. A reaction exhibiting a large K will reach equilibrium when most of the reactant has been converted to product.
3. A small K instead indicates the reaction achieves equilibrium after very little reactant has been converted.
4. So K is a measure of extent rather than of speed.
_Source: OpenStax Chemistry 2e (CC BY 4.0), Ch 13 'Fundamental Equilibrium Concepts', sections 13.1-13.4_
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