colourmeter

Question 1

what does this do?

Answer 1

= determine the concentration of a substance in a solution
= need to produce a dilution series
= measure absorbance over concentration- these vakues are sed to form a calubration curve, used to find an unknown concentration based on absorbance
= to calibrate we use disillted water

Question 2

How do we determine concentration without the use of a colourimeter?

Answer 2

= use known concentration of the sample
= create a dilution series
= compare results with a colour standard