Question

Sarah collected some sands from Caribbean beach during her honeymoon. But she incidentally dropped some salt into the sands. Based on the physical properties of sands and salt, design a proper procedure for Sarah to recover her sands from salt in a chemistry lab. Describe their property difference first and then draw a flow chart to show your steps

Answer 1

Ans.

Sand and salt can be separated based on their differences in solubility in water. Sand is insoluble in water. Whereas, salt is easily soluble in hot water.

To separate them, follow the following steps.

1. Pour some water to the mixture of sand and salt.

2. Heat the mixture with water till all the salt dissolves.

3. Filter out the sand. Wash the sand with clean water and dry the sand.

4. The filtrate is the solution of the salt. Heat it till all the water evaporates leaving behind the salt.