Purity and formulations Flashcards
1
Q
What is a pure substance?
A
Something that contains only one type of element or compound.
2
Q
What do pure substances melt and boil at?
A
Specific temperatures.
3
Q
How can you test the purity of a sample?
A
By measuring its melting or boiling point and comparing it to pure substances which you can find from a data book.
4
Q
What temperature do impure substances melt and boil at?
A
They don’t have a specific melting or boiling point. They melt and boil over a range of temperatures.
5
Q
How do impurities affect the melting and boiling point?
A
It will decrease the melting point and increase the boiling point.
6
Q
What is a formulation?
A
A useful mixture with a precise purpose that has been made by following a formula.
7
Q
What are examples of formulations?
A
Fertilisers
Paint
Medicines
