(a) State the main points of difference between homogeneous and heterogeneous mixtures.
(b) Classify the following materials as homogeneous mixtures and heterogeneous mixtures.
Soda-water, Wood, Air, Soil, Vinegar, Alcohol and water mixture, Petrol and water mixture, Chalk and water mixture, Sugar and water mixture, Copper sulphate solution.
(a) Homogenous mixture:
1. A substance that is uniform in composition.
2. It has a single phase.
3. Sugar solution, salt solution are examples.
Heterogeneous mixture:
1. Composition is not uniform.
2. More than two phases.
3. Sugar solution, sand solution are examples.
(b) Homogeneous mixtures: Soda water, air, vinegar, alcohol and water mixture, sugar and water mixture, Copper sulphate solution.
Heterogeneous mixture: Wood, petrol and water mixture, chalk and water mixture.