kinetics II

Question 1

rate of reaction definition

Answer 1

increase in the amount of products created in a reaction over time

Question 2

rate equation in terms of concentration

Answer 2

channge in concentration/ change in time

Question 3

whats the rate equation

Answer 3

K(A)2 (B)

Question 4

making k subject of equation

Answer 4

k= rate / products and reactants

Question 5

how to measure rate of reaction

Answer 5

increase in conc of products
or decrease in conc of reactants

Question 6

what method is used to measure conc of a solution

Answer 6

titration or back titration

Question 7

equation for rate

Answer 7

change in concentration/ change in time

Question 8

gradient =

Answer 8

dy/dx

Question 9

how to calculate rate of reaction

Answer 9

draw tangent on zero and go all the way up and work out the gradient of the line

Question 10

how to find order of something from graph

Answer 10

find out gradients of different reactions and plot rate against concentration and see how much one increases when other does

Question 11

order of curved graph of rate

Answer 11

2 and ALWAYS 2

Question 12

rate equations for multi step reactions

Answer 12

cross out intermediates and find letters that are reactamts in overall equation and out into rate equation

Question 13

rate determining step

Answer 13

slowest step in the reaction which determines the rate

Question 14

boltzmans expression

Answer 14

e -ea/RT

Question 15

units for T in equation

Answer 15

K

Question 16

units for Ea in expression

Answer 16

J mol-1

Question 17

units for R in expression

Answer 17

J K-1 mole-1

Question 18

arrhenius equation

Answer 18

K = Ae -Ea/RT

Question 19

what to do when given temp jumo eg 20 to 60

Answer 19

calculate initial k and final k and take away final from initial

Question 20

ln

Answer 20

ln(ex) = x

Question 21

natural logarithm with arrhenius equation

Answer 21

ln(A) - Ea/RT

Question 22

natural log both sides of arrhenius equation

Answer 22

ln(K) = ln(A) - Ea/RT

Question 23

make activation energy subject of equation arrhenius

Answer 23

Ea= RT (in(A) - in(K)

Question 24

rearrange temperature in arrhenius equationwith natural log

Answer 24

T= Ea/R*in(A)-ln(K)

Question 25

arrhenius equation in y=mx+c format

Answer 25

ln(k) = -Ea/R * 1/T + in(A)

Question 26

gradient of line in arrhenius equation in y=mx+c format

Answer 26

-Ea/R

Question 27

rearrange to find activation energy once gradient found

Answer 27

Ea= R * (-gradient)
answer always positive because double negative

Question 28

x axis of arrhenius graphs

Answer 28

1/T

Question 29

y axis of arrhenius graph

Answer 29

ln(K)