Rate Of Equation

Question 1

Define reaction rate

Answer 1

Increase in concentration of products per unit time or the decrease in concentration of reactants per unit time

Question 2

How to determine the unit for rate?

Answer 2

(mol dm-3) ^1-n s-1

n= overall equation

Question 3

Define rate equation/rate law

Answer 3

Equation that describes the mathematical relationship between the rate of reaction and [rxts]

Question 4

Define order of reaction

Answer 4

In an experimentally determined rate equation,

rate=k[A]^x
where X= order of reaction wrt A

Question 5

How zero order of reaction changes when [rxt] changes?

Answer 5

No change

-> rate is independently of concentration

Question 6

How first order of reaction changes when [rxt] changes?

Answer 6

•rate is directly proportionate to [A]
Eg: if rate x4, [A] x4

•it will have a constant half-life
-> t0.5=ln2/k

Question 7

How second order of reaction changes when [rxt] changes?

Answer 7

•rate is propor. to [A]^2

Question 8

Define half-life

Answer 8

Time taken for the concentration of a reactant to fall half its initial value. It is only constant for a first order of reaction

Question 9

Define rate constant

Answer 9

In an experimentally determined rate equation,

rate= k[A]^x
where k= rate constant