Expressing Reaction Rate
reaction rate = the changes in [reactants] or [products] per unit time;
[reactant] decreases, [product] increases
Average rate of reaction = - ([A2] - [A1]) / (t2 - t1)
A B
Measure [A1] at t1, then measure [A2] at t2
= - D[A] / Dt
rate units = mol/L/s
Also, reaction rate = + D[B] / Dt
rate is always
expressed as a
positive value
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