# Unit 5: Module 1 - Rates, Equilibrium and pH (F325)

Rate of reaction
The change in concentration of a reactant or product per unit of time.
1 of 10
Units of rate
mol dm^-3 s^-1 (concentration/time)
2 of 10
Initial rate of reaction
The change in concentration of a reactant or product per unit of time at the start of the reaction, when T=0.
3 of 10
Rate equation for a reaction A + B -> C
Rate = k[A]^m[B]^n ('m' is the order of reaction with respect to A, 'n' is the order of reaction with respect to B)
4 of 10
Order with respect to a reactant
The power to which the concentration of the reactant is raised in the rate equation.
5 of 10
Zero Order, rate ≈ [A]^0
Rate is UNAFFECTED by changing the concentration of A.
6 of 10
First Order, rate ≈ [B]^1
If [B] increases by 2 times, the rate also increases by 2 times.
7 of 10
Second Order, rate ≈ [C]^2
If [C] increases by 2 times, the rate increases by 2^2 = 4 times.
8 of 10
Overall Order of reaction
The sum of the individual orders, m + n.
9 of 10
Rate Constant, k
The constant that links the rate of reaction with the concentrations of the reactants raised to the powers of their orders in the rate equation.
10 of 10

## Other cards in this set

### Card 2

#### Front

mol dm^-3 s^-1 (concentration/time)

Units of rate

### Card 3

#### Front

The change in concentration of a reactant or product per unit of time at the start of the reaction, when T=0.

#### Back ### Card 4

#### Front

Rate = k[A]^m[B]^n ('m' is the order of reaction with respect to A, 'n' is the order of reaction with respect to B)

#### Back ### Card 5

#### Front

The power to which the concentration of the reactant is raised in the rate equation.

#### Back ## Comments

No comments have yet been made

## Similar Chemistry resources:

See all Chemistry resources »See all Rates resources »