unit 3 - Chemical analysis

Question 1

name and describe the two types of chemical analysis

Answer 1

qualitative analysis - used to find out if a substance is present in a sample (e.g. the flame test). quantitative analysis - used to find the quantity of a substance in a sample (e.g. titrations)

Question 2

what is the flame test used to test?

Answer 2

identify the presence of metals in a substance

Question 3

what is a precipitation reaction?

Answer 3

reaction in which substances and solution are mixed and an insoluble product is made

Question 4

explain quantitative precipitation

Answer 4

since a precipitate is an insoluble solid, it can be separated from a solution by filtration. the separated solid can then be dried out in an oven and then weighed. using the mass of precipitate produced we can also calculate the mass of the reactants