chemical industry

Question 1

define the rate of reaction

Answer 1

the change in concentration of a reactant or product at a given time

Question 2

what are the units for rate?

Answer 2

moldm^-3 s^-1

Question 3

what is k?

Answer 3

rate constant

Question 4

What is the rate equation?

Answer 4

rate = k(A)^a(B)^b

Question 5

what is the pattern in half lives for a zero order reaction?

Answer 5

half life decreases

Question 6

what is the pattern in half lives for a fisrt order reaction?

Answer 6

constant half life

Question 7

what is the pattern in half lives for a second order reaction?

Answer 7

half life increases

Question 8

what is the equation for k?

Answer 8

k=ln2/t(1/2)

Question 9

what is the effect of temperture on the equilibrium constant?

Answer 9

it changes it

Question 10

what is the effect of pressure on the equilibrium constant

Answer 10

nothing

Question 11

what is the effect of adding a catalyst on the equilibrium constant?

Answer 11

nothing

Question 12

what is N2O?

Answer 12

dinitrogen monoxide / nitrous oxide / nitrogen(i)oxide

Question 13

what is NO

Answer 13

nitrogen monoxide / nitric oxide / nitrogen(ii) oxide

Question 14

what is NO2?

Answer 14

nitrogen dioxide / nitrogen(iv) oxide

Question 15

what is the appearance of N2O

Answer 15

colourless gas, sweet smell - laughing gas

Question 16

what is the appearance of NO?`

Answer 16

colourless gas

Question 17

what is the appearance of NO2?

Answer 17

brown gas, sharp odour, toxic

Question 18

what is the test for NO3- nitrate(v)

Answer 18

warm with NaOH and Devardas alloy
reduces to ammonia gas

red litmus paper blue

Question 19

what is the test for ammonium?

Answer 19

warm with NaOH
makes ammonia gas

red litmus paper blue