Separating mixtures

We can do so many experiments in this chapter. I ever done such two of the experiments. I will give some experiment that showing the examples of separating mixtures. If you want to do it, sure you can!

1. When some solids are added to a container of water, they do not dissolve. They are insoluble in water. An example of this is sand mixed together with water. We can separate this type of mixture by decanting and filtration.


Decanting  is the separation of an insoluble solid from liquid by pouring away the liquid and leaving behind the solid.

Filtration is the process of separating small, insoluble solids from a liquid using filter. A filter is a semi-permeable  material which only allows some substances to pass through it but not others.


2. To separate a mixture, we need to know the substances the mixture is made up of first. We also need to know properties of these substances. We can then determine the correct technique to separate the mixture. Take a look at the examples:

- Add some water to a mixture that containing sand and salt. Then, stir well to dissolve all the salt.

- Filter the mixture using a funnel lined with a filter paper to separate the sand from the the saltwater. Leave the sand on the filter paper to dry. Sand is obtained.





-Heat the beaker containing the saltwater over flame to evaporate the water.





- When all the water has evaporated, the salt can be obtained.


I only have that kind of examples. If you wanna try, please be very careful when you turn on the fire..... :D