3.1.9-Rate Equations

Question 1

What is the rate equation showing

Answer 1

It shows the relationship between concentration of reactants to the rate of chemical reaction

Question 2

Define order of reaction

Answer 2

With respect to a reactant is the power to which the concentration of a reactant is raised

Question 3

Define overall order of reaction

Answer 3

The sum of the powers of the concentration terms in the rate equation

Question 4

Define rate constant

Answer 4

The constant of proportionality in a rate equation, value of which is dependent on temperature and activation energy in a reaction

Question 5

What is the only thing K is affected by

Answer 5

Temperature

Question 6

What does the Arrhenius equation show

Answer 6

The relationship between temperature and the rate constant

Question 7

Show 3 forms of the Arrhenius equation

Answer 7

K= Ae^ -Ea/RT

LnK= LnA - Ea/RT

Ea = RT(LnA-LnK)

Question 8

Draw graph to represent Arrhenius equation and label

Answer 8

Draw

Question 9

Describe what the Arrhenius graph is showing

Answer 9

Natural log of Arrhenius equation gives a straight line means activation energy and Arrhenius constant can be found from graph

Question 10

How is the rate equation determined

Answer 10

Experimentally determines relationship

Question 11

What can rate equations tell us

Answer 11

Tell us about mechanism and if there is a catalyst

Question 12

Draw the zero order concentration time graph

Answer 12

Draw

Question 13

Draw the first order concentration time graph

Answer 13

Draw

Question 14

Draw the second order concentration time graph

Answer 14

Draw

Question 15

How can you find the rate constant from the concentration time graph

Answer 15

On the zero order graph only the gradient gives the the rate constant

Question 16

Draw zero order rate concentration graphs

Answer 16

Draw

Question 17

What does a horizontal line mean on a rate concentration graph

Answer 17

Zero order

Question 18

Draw rate concentration graph of first order

Answer 18

Draw

Question 19

What does a rising straight line mean on a rate concentration graph

Answer 19

First order

Question 20

Draw second order concentration time graph

Answer 20

Draw

Question 21

What does a upward curve mean on a rate concentration graph

Answer 21

Second order

Question 22

What methods are used to make a rate concentration graphs

Answer 22

Intial rates method

Continuous rates method

Question 23

Explain initials rates method

Answer 23

Doing several experiments where the the initial rate is measured and initial concentrations reagent is changed

Question 24

Explain continuous rates method

Answer 24

Doing one experiment where rate and concentration of a reagent is measured at several times during reaction

Question 25

What is the rate determining step

Answer 25

Overall a reaction is dependent on its slowest step which is called the rate determining step