Question

Classify each of the following as a homogeneous and heterogeneous mixture: soda water, wood, air, soil, vinegar, filtered tea.

Answer 1

Hint: To answer this question, we must know about homogeneous and heterogeneous mixture. In homogeneous mixture, composition is uniform throughout the mixture but in heterogeneous mixture composition is varied from point to point.

Complete step by step solution:
Let us distinguish between homogeneous and heterogeneous mixture:
> If the mixture consists of only one phase, the solution is homogeneous and if the mixture seems to consist of more than one phase, the solution is heterogeneous.
> In filtered tea, vinegar, air and soda water, the composition of solution is uniform and the particles are not visible distinctly and behave as one phase. So, they are examples of homogeneous solutions.
> In wood and soil, the composition is not uniform throughout the mixture. So, they are examples of heterogeneous mixture.
> So, classification of mixture is as follows:
Homogeneous mixture: Filtered tea, vinegar, air and soda water
Heterogeneous mixture: wood and soil

Additional Information:
The difference between homogeneous and heterogeneous mixture are,

Homogeneous mixture	Heterogeneous mixture
1)Throughout the mixture composition is uniform	1) Throughout the mixture composition is not uniform
2)No visibility of components	2)Visibility of components
3)Only one phase present	3)More than one phase present and separation of layer takes place
4)The separation of components is not easy	4)Separation of components is easy
5)The size of particle is very small	5)Size of particle is large

Note: Students might be confused to choose the type of solutions in case of air. Pure air is a homogeneous mixture but polluted air is a heterogeneous mixture because of the presence of impurities.