purity
Cards (2)
- in chemistry, a pure substance is something that only contains one compound or element
- usually, a pure substance is a substance that has nothing added to it e.g milk
- the purity of a substance can be tested measuring its melting and boiling points and comparing then to those of a pure substance
- impurities in the sample will lower the melting point and increase the melting range
- impurities in the sample will increase the boiling point