noun. a chemical substance that is present at the start of a chemical reaction.
Sentences with reactant
1. Noun, singular or mass
Second order reactions are reactions whose rate depends on the concentration of one reactant to the second power or on the concentrations of two reactants each to the first power.
The reaction order is the sum of the power to which reactant concentrations in the rate law are raised.
3. Verb, base form
The rate of substrate disappearance (and reactant appearance) in reactions in which enzymes are involved is not linear, but rather tends to slow down as the reaction nears completion.
4. Verb, non-3rd person singular present
In this reaction some reactant A is turned into some product B.