2. Concentration time graph

Question 1

definition

half-life t 1/2

Answer 1

(of a reactant) is the time taken for concentration of the reactant to reduce by half

Question 2

calculating k  (first order reaction)
units

Answer 2

k = ln 2 (calculator) / t1/2

s-1

Question 3

how to find rate from concentration time graph

Answer 3

tangent

change in conc / time

Question 4

reactions involving acid/ base measure

Answer 4

ph change by carrying out titration

ph change by using ph metre

Question 5

reactions involving producing gas measure

Answer 5

change in volume or pressure

loss in mass of reactants

Question 6

reactions that produce visual change observe

Answer 6

formation of precipitate 
colour change (monitor using colorimeter. intensity of colour directly related to conc)