chemical analysis - purity and formulations Flashcards
1
Q
what can a pure substance be?
A
an element or a single compound
2
Q
what is a pure substance?
A
not mixed with any other substance
3
Q
when does a pure substance melt? boil?
A
a) at a specific fixed temperature
b) at a specific fixed boiling point
4
Q
when does an impure substance melt and boil?
A
over a range of temperatures
5
Q
impure graph
A
the change of state will be a slope instead of a straight line
6
Q
what is a formulation?
A
a complex mixture that has been designed as a useful product
7
Q
in a formulation, how does the product have the properties we need?
A
the quantity if each component is carefully measured
8
Q
examples of formulations
A
fuel, paint, alloys, fertilisers
