Chemistry / Unit 9 Chem 1601 short lesson, about 20 seconds
Reaction Rate Defined
Captions available
The idea
A reaction rate is a reactant's or product's concentration change divided by elapsed time, reported as a positive quantity.
In practice
Dissolved hydrogen peroxide loses concentration over hours as it decomposes; dividing that loss by the elapsed time gives its rate.
Where people slip
A reactant's concentration falls as a reaction runs, so its change is negative — the rate flips that sign to stay positive.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
Unlocks
- 1604Relative Reaction Rates from Stoichiometry
- 1610Average, Instantaneous, and Initial Rate
- 1615Reactant Identity and Reaction Rate
- 1632The Rate Law and Reaction Order
- 1741Dynamic Equilibrium: Equal Rates, Not Equal Concentrations
- 1746Equilibrium as a Consequence of Kinetics
- 2061Spontaneous Process Defined
- 2063Twin: Spontaneous Does Not Mean Fast
Something wrong in this lesson? Flag it · Sources for Chemistry