Separating mixtures

Question 1

name 5 methods of separating mixtures

Answer 1

Hand sorting Sieving Settling & decanting Filtering Stilling (evaporation)

Question 2

Explain hand sorting

Answer 2

removing individual large insoluble particles that are easy to see from the mixture

Question 3

Explain Sieving

Answer 3

when mixture is passed through a sieve which allows smaller particles to pass through. it traps larger insoluble particles.

Question 4

Explain settling & decanting

Answer 4

this relies on gravity to separate insoluble particles from a mixture. Heavier particles sink to the bottom leaving the lighter substance at the top. The light substance can then be carefully poured off from the top without disturbing sediment at the bottom.

Question 5

Explain filtering

Answer 5

This is like sieving because the mixture is passed through a number of layers of material with different sized particles like sand & gravel. Trapping the large insoluble particles.

Question 6

Explain stilling (evaporation)

Answer 6

this uses energy to heat the mixture. only works if one of the substances in the mixture evaporates. in the case of sugar and water, the water evaporates and leaves the sugar behind.