Chemical analysis (P2)

Question 1

What is a pure substance?

Answer 1

A substance containing only 1 element or compound, not mixed with other substances.

Question 2

How can you find out how pure a susbtance is?

Answer 2

.Pure substances melt and boil at specific temperatures
.Compare the melting point or boiling point of the substance to the data of the melting point or boiling point of the pure substance
.The closer it is to the actual m.p or b.p, the purer it is

Question 3

What do impurities do to the melting point and to the boiling point?

Answer 3

Impurities lower the melting point.

Impurities increase the boiling point.