how do u find out the purity of sand

To find out the purity of sand, you can use a simple method called the sedimentation test. Here's how you can do it:

1. Take a clear glass jar or beaker and fill it about two-thirds full with water.
2. Collect a representative sample of sand that you want to test. Make sure to take a sufficient amount of sand to obtain an accurate result.
3. Add the sand sample to the jar of water and stir it vigorously to ensure that the sand is well-mixed with the water.
4. Allow the mixture to settle for a while, typically around 1 to 2 hours. During this time, the sand particles will start to settle at different rates depending on their composition and purity.
5. Observe the settled layers that form in the jar. The different layers represent the different particles in the sand sample.
- The topmost layer may contain organic matter, debris, or lighter materials that are less pure.
- The bottom layer will generally consist of pure sand particles.
- In some cases, you may also notice intermediate layers that indicate the presence of impurities or different types of particles.
6. Measure the thickness or height of the layers to determine the proportion and purity of sand in the sample. A thicker bottom layer indicates a higher purity of sand.

It's important to note that this method gives you a visual estimation of the purity of sand and is not a quantitative analysis. For a more accurate purity assessment, you would need to perform additional tests using specialized equipment and techniques in a laboratory.