Question

Classify the following as homogeneous and heterogeneous mixture:

Salt solution

Answer 1

Salt solution is a homogeneous mixture.

• This is because in salt solution i.e.; Sodium chloride $\left(\mathrm{NaCl}\right)$ dissolved in Water $\left({\mathrm{H}}_2\mathrm{O}\right)$ contains salt particles distributed uniformly in the water and there is uniformity in the properties of the mixture throughout.
• There is no boundary of separation in the mixture.

Mixture: When two or more substances (elements or compounds or an element and compound) are mixed in any proportion.

Homogeneous mixture: A mixture that exhibits uniformity in its composition and properties throughout its mass is known as a homogeneous mixture.Example: Sodium chloride $\left(\mathrm{NaCl}\right)$ solution, Sugar $\left({\mathrm{C}}_{12}{\mathrm{H}}_{22}{\mathrm{O}}_{11}\right)$ solution etc.

Heterogeneous mixture: A mixture that does not exhibit uniformity in its composition and properties throughout its mass is known as a heterogeneous mixture. Example: Muddy water, Sand and Iron $\left(\mathrm{Fe}\right)$ nails combined together.