Question

classify colloids where the dispersion medium is water. state their characteristics and write an example of each of the classes. ​

Answer 1

Explanation:

These are of two types

(i) Hydrophilic Stability: More stable as the stability is due to charge and water envelope surrounding the sol particles. Nature: Reversible Examples: Starch, gum, etc.

(ii) Hydrophobic Stability: Less stable as the stability is due to charge only. Nature: Irreversible Examples: Metal hydroxide like Fe(OH)3 and metal sulphide like As2S3

Answer 2

Answer:

These are of two types:

1. Hydrophilic stability: More stable as the stability is due to charge and water envelope surrounding the sol particles.

Nature: Reversible sol.

Examples: starch, gum, etc.

ii. Hydrophobic stability: Less stable as the stability is due to charge only.

Nature: Irreversible sol.

Examples: Metal hydroxide like Fe(OH)3

and metal sulphide like As2s3