Yes, sand in water is a classic example of a suspension.
A suspension is a type of mixture where solid particles are dispersed throughout a liquid but will eventually settle out if left undisturbed. This is different from a solution, where the components are uniformly mixed and do not separate. In the case of sand and water, the sand particles are large enough to be visible and will eventually sink to the bottom of the container. This settling is a key characteristic that defines a suspension.
Key Characteristics of Suspensions
Here's a breakdown of why sand in water is considered a suspension:
- Visible Particles: The sand particles are large enough to be seen with the naked eye.
- Settling: If you let a mixture of sand and water stand, the sand will settle to the bottom over time.
- Non-Uniform Distribution: The sand is not evenly distributed throughout the water; it is a heterogeneous mixture.
- Separation: The sand and water can be easily separated through methods like decanting or filtration.
Examples of Suspensions
Besides sand in water, other common examples of suspensions include:
- Muddy water
- Flour in water
- Some medications (shake well before use!)
- Paint
Suspension vs Solution: A Comparison
| Feature | Suspension | Solution |
|---|---|---|
| Particle Size | Relatively large, visible to the naked eye | Very small, not visible to the naked eye |
| Settling | Particles settle out over time | Particles do not settle out |
| Uniformity | Heterogeneous mixture | Homogeneous mixture |
| Separation | Components can be easily separated | Components cannot be easily separated |
| Light Scattering | Suspensions are opaque or cloudy | Solutions are generally clear |
The reference provided specifically states, "An example of a suspension is a mixture of water and sand. When mixed up, the sand will disperse throughout the water. If left alone, the sand will settle to the bottom."
