How will we separate a mixture of common salt and mustard seeds?

Answer 1

(i) The mixture of water, groundnut oil and common salt will be put in separating funnel and allowed to stand for sometime.

(ii) The mixture separates into two layers according to the densities of water and groundnut oil.

(iii) Water is heavier than groundnut oil .

(iv) So, water forms lower layer while groundnut oil forms upper layer.

(v) On opening the stop clock of separating funnel, the lower layer of water comes out first and collected in beaker leaving behind groundnut oil.

(vi) Now, solution of water and common salt will be heated.

(vii) Water will be evaporated leaving behind solid common salt.

Answer 2

If you place the container over an open flame or any source of extreme heat, the water will evaporate, leaving the salt at the bottom (and sometimes on the side, due to popping of the solution while boiling). Do NOT try to do any of this without supervision or outside of a chemistry class.

Answer 3

To separate a mixture of common salt and mustard seeds, you can use the method of sieving. A sieve with fine holes can be used to separate the smaller mustard seeds from the larger salt crystals. By pouring the mixture through the sieve, the salt will be retained on top while the smaller mustard seeds will pass through.

Answer 4

By using your eyes and separating it from each other by hands

Answer 5

1. Add water to the mixture and stir; sodium chloride is soluble.

2. Filter the mixture.

3. Sodium chloride dissolved is filtered and remain in solution.

Answer 6

Dissolve the mixture in water and filter; the fitrate must be heated - be evaporation water is released and NaCl remain as crystals.

Answer 7

handpicking