18.2 Concentration-time graphs

Question 1

how are concentration-time graphs plotted?

Answer 1

from continuous monitoring

Question 2

what is continuous monitoring?

Answer 2

when continuous measurements are taken over a course of a reaction

Question 3

what is the gradient of a concentration-time graph?

Answer 3

the rate of reaction

Question 4

what are the two ways of measuring gas production?

Answer 4

volume of gas produced
change in mass

Question 5

how can the production of non-gases be monitored?

Answer 5

using colorimetry
allows you to measure a colour change

Question 6

what shape is zero order reaction?

Answer 6

straight line with negative gradient

gradient stays the same

Question 7

what shape is a first order reaction?

Answer 7

downward curve

gradient decreases over time
half life is constant

Question 8

what is half life?

Answer 8

time taken for concentration to be halved

Question 9

what does a constant half life in a reaction indicate?

Answer 9

that the reaction is first order

Question 10

how to find k from half life?

Answer 10

ln2/half-life