R2.2: How fast? The rate of chemical change
Rate of reaction is how fast reactants are consumed or products are formed, measured as the change in concentration per unit time
Rate =
Why can [reactant] be negative?
Reactant concentration decreases as it is consumed
doesnt change = 0 order
if the rate doubles when you double the concentration, = 1st order
if you double it and the rate goes up by the square of the factor by which youve change the concentration, = 2nd order