Chemistry Practicals

Question 1

In 4 Steps How do you Separate Mixtures By using Filtration?

Answer 1

• 1) Place filter paper inside a funnel, and position it over a conical flask.
• 2) Slowly pour the insoluble solid and liquid mixture into the filter paper.
  -3) The liquid (filtrate) passes through, while the solid (residue) stays on the filter paper.
• 4) The filtrate is in the flask, and the residue remains in the funnel, completing the separation.

Question 2

In 4 Steps How do you separate Mixtures Using Crystallisation?

Answer 2

• 1) Gently heat the solution in an evaporating dish to evaporate some water and make it more concentrated.
• 2) Remove from heat and allow it to cool slowly so crystals start to form.
• 3) Use filtration to separate the solid crystals from the remaining solution.
• 4) Leave the crystals in a warm place or use filter paper to dry them.

Question 3

In 5 Steps How do you separate mixtures using chromatography?

Answer 3

• 1) Use a pencil to draw the base line near the bottom of the chromatography paper.
• 2) On the base line add your sample of ink which will contain different substances.
• 3) Then find a Becker and fill it with a shallow amount of solvent.
• 4) Place the paper in the solvent but don’t submerge the base line and spot of ink and then add a lid to stop the solvent from evaporating.
• 5) Wait For the solvent to seep up the paper and as it does the different dyes that make up our ring will dissolve in the solvent and move up with it.

Question 4

In 4 Steps how Do you separate Mixtures Using Simple Distillation?

Answer 4

• 1) Place the mixture in a round-bottom flask and heat it with a Bunsen burner.
• 2) The liquid with the lowest boiling point turns into vapor and rises.
• 3) The vapor passes through a condenser, where it cools and turns back into a liquid.
• 4) The distillate (pure liquid) is collected in a beaker or flask, leaving behind any dissolved solids.

Question 5

In 4 Steps How do You separate Mixtures By using Fractional Distillation?

Answer 5

• 1) Place the liquid mixture in a round-bottom flask and heat it with a Bunsen burner.
• 2) The liquids with the lowest boiling points evaporate first and rise through the fractionating column, which helps separate substances with similar boiling points.
• 3) The vapours pass into a condenser, where they cool and turn back into liquid.
• 4) The different fractions (liquids) are collected at different temperatures as they condense at different points.