Question

Steps for separating a mixture of salt,sand and camphor

Answer 1

1 sublimation of the mixture
- this would result in separation of camphor and now we aer left with salt and sand
2 adding solvent i.e water in the mixture
- salt will get dissolve in water and sand will not
3 decandation and filteration
- the heavier particles of soil will settle down and there will be a line of separation
Now , slowly and carefully pour water into another beaker and then pass water through filter paper which would separate small particles of sand with water
4 vapourisation / boiling
- let the water be boiled / vapourised ..
Now we would left with super saturated salt it the beaker
5 crystalization
- keep the saturated solution in cool place and we would observe cyrstals of salt ... The end

Answer 2

ANSWER :

The mixture of sand and camphor can be separated by the process of sublimation. As camphor is a sublime substance (camphor changes directly into its gaseous sate on heating).

Sublimation : The process in which the solid changes directly into gaseous state on heating is called sublimation.

Here is the method to separate the mixture of sand and camphor.

Aim of the experiment : To separate the mixture of sand and camphor with the process of sublimation.

Material required : cotton wool,  funnel, mixture of sand and camphor, tripod stand, wire gauge, burner,china dish

Procedure :

• Take the mixture of sand and camphor in a china dish.
• Cover it with an inverted funnel whose narrow end is closed with cotton wool.
• Heat the china dish on a wire gauge.
• On heating the camphor changes directly into gaseous state and rises up.
• The vapours of the camphor cools down and changes back to solid state and sticks to the walls of the funnel when it come in contact with walls of the funnel.

Observation : The solid that sticks to the walls of the funnel is camphor and the remains in the china dish is sand.

Hence

Sand and camphor are separated from each other.