noun
definition
Any of the participants present at the start of a chemical reaction
Examples of reactant in a Sentence
A high temperature from a match or spark etc., gives the reactant molecules enough kinetic energy to overcome the activation energy * .
Reactions may commonly be zero order, first order or second order with respect to a particular reactant.
There is now space on the surface of the nickel for new reactant molecules to go through the whole process again.
Not only is the product a stereospecific optical isomer, the reactant is it self a stereospecific geometrical isomer!
This is the time taken for the concentration of the reactant species to fall to half its initial value.
The graph tends toward a maximum amount possible when all the solid reactant is used up and the graph becomes horizontal.
However now for the reaction to continue we need a supply of fresh reactant to approach the electrode surface.
Consequently there will be a lower reactant concentration at the electrode than in bulk solution.
Therefore, there is more chance that a reactant particle will hit the solid surface and react.
Synchrotron infrared spectroscopy allowed the chemisorption bonds of both surface modifiers and reactant molecules to be probed with high spectral resolution.
The reactant gases would probably be supplied to the system via external manifolding in this case.