Chemical Industry

Question 1

Define rate of reaction

Answer 1

The change in the amount of reactants or products per unit of time

Question 2

What is the rate constant? What can change it?

Answer 2

The k in rate=k (a)^m(b)^n

Affected by temperature

Question 3

What is the order of a reaction?

Answer 3

The power of the concentration term in rate equation

Question 4

What is the rate equation?

Answer 4

Rate = k(a)^m(b)^n

Question 5

What is the half life of a reaction?

Answer 5

Time taken for a reactant to halve in quantity

Question 6

What is the half life for first order?

Answer 6

Constant

Question 7

What happens to the half life in zero order?

Answer 7

Decreases- straight line down

Question 8

What happens to half life for second order?

Answer 8

It increases

Question 9

What is the equation to calculate the rate constant of a first order reaction using half life’s?

Answer 9

K=ln2/half life

Question 10

What is the gradient of the arenius equation?

Answer 10

-Ea/R

Question 11

What is the intercept of the Arrhenius equation?

Answer 11

LnA

Question 12

What is the rate determining step?

Answer 12

The slowest step in a multi step reaction

Question 13

What must be in the rate determining step?

Answer 13

Anything in the rate equation

Question 14

How can you predict the rate equation from the rate determining step?

Answer 14

The order of reaction with respect to a reactant shows the number of molecules of that reactant involved in the rate determining step

Question 15

What can change Kc?

Answer 15

Temperature

Question 16

What does adding a catalyst do to position of equilibrium?

Answer 16

Nothing

Question 17

how can you tell what is in the rate equarion?

Answer 17

any reactants introduced in or before the rate determining step

Question 18

what is the test for nitrate(v)?

Answer 18

warm with dervardas alloy and NaOH - ammonia gas evovles

Question 19

what is the test for ammonium?

Answer 19

warm with NaOH - ammonia gas evolves

Question 20

what is the 3 names of N2O?

Answer 20

nitrogen (i) oxide
dinitrogen monoxide
nitrous oxide

Question 21

what are the 3 names of NO?

Answer 21

nitrogen (ii) oxide
nitrogen monoxide
nitric oxide

Question 22

what are the 2 names of NO2?

Answer 22

nitrogen (iv) oxide

nitrogen dioxide

Question 23

what appearance is N2O?

Answer 23

colourless gas

Question 24

what is the appearance of NO?

Answer 24

COLOURLESS GAS - laughing gas has a sweet smell

Question 25

what is the appearance of NO2?

Answer 25

BROWN GAS - sharp odour and toxic

Question 26

how do you get from NO3- (NITRATE (V)) to nitrogen gas?

Answer 26

2NO3- + 12H+ + 10e-

Question 27

how do you get from nitrite to nitrate?

Answer 27

NO2- + H2O

Question 28

how do you get from NH4+ to NO2-

Answer 28

NH4+ + O2

Question 29

how do you get from nitrgoen to ammonia?

Answer 29

N2+3H2

Question 30

How do you get from nitrogen to NO?

Answer 30

N2 + O2 ——-> 2NO

Question 31

how di you get from nitrogrn to NO2?

Answer 31

N2 + 2O2 ——-> 2NO2

Question 32

How do you get from nitrogen to N2O?

Answer 32

2N2+O2——–> 2N2O