Starter quiz
- Which substances are insoluble (do not dissolve) in water?
- sugar
- sand ✓
- rubber ✓
- salt
-
- A ______ is a material that contains two or more different substances, which can be physically separated.
- 'mixture' ✓
- What mixture is formed when a substance dissolves in a liquid?
- solution ✓
- insoluble
- soluble
- solar
-
- Match the following words to their meaning.
- Soluble⇔A substance which can dissolve in a liquid. ✓
- Separate⇔To divide something into its different parts. ✓
- Insoluble⇔A substance which cannot dissolve in a liquid. ✓
- Equipment⇔Items needed to perform a task. ✓
- Iron is a ______ material as it is attracted to magnets.
- 'magnetic' ✓
- Which of the following are mixtures?
- orange juice ✓
- oxygen
- air ✓
- table salt
- carbon
-
Exit quiz
- Some insoluble solids are more ______ than a liquid and this property causes them to sink.
- 'dense' ✓
- What is the name of the two separation techniques that involve mixtures being poured?
- Evaporating
- Decanting ✓
- Distilling
- Filtering ✓
-
- Match the words with their definitions.
- residue⇔The insoluble solid collected in the filter paper. ✓
- filtrate⇔The liquid separated from the insoluble solid. ✓
- separation⇔To physically divide different parts of a mixture. ✓
- insoluble⇔Unable to dissolve in a liquid. ✓
- Order the followings steps to show how to set up the equipment to perform the filtration of an insoluble solid in a liquid.
- 1⇔place a conical flask with a flat bottom and narrow neck on the table
- 2⇔place a filter funnel in the neck of the flask
- 3⇔fold the round filter paper into quarters
- 4⇔open one quarter of the filter paper to form a pocket
- 5⇔place the filter paper pocket into the filter funnel
- 6⇔add a drop of water to keep the filter paper in place
- Filtration is used when making a cup of tea from a teabag. Match up the scientific word to the part involved in making the cup of tea.
- filter⇔the teabag ✓
- filtrate⇔the tea drink ✓
- residue⇔the tea leaves ✓
- pores⇔holes in the teabag ✓
Look at the image of filtering equipment. Choose the problems that could occur when filtering.- all filtrate particles pass through the filter paper pores
- the mixture is rapidly poured through the filter paper ✓
- the residue particles are blocked by the filter paper pores
- a beaker is used rather than a conical flask ✓
- the filter-funnel is filled to the top ✓
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Worksheet
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Presentation
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Video
Lesson Details
Key learning points
- Magnets attract iron and steel
- Insoluble solids can be separated from a liquid using a filter by a process known as filtration.
- Filter paper is folded to make a pocket that fits in a filter funnel for filtering fine particles
- A drop of water on a filter funnel helps keep the filter paper cone open for easy filtering
Common misconception
A funnel is the same as a filter. Dissolved substances will be collected in the filter paper.
A filter separates materials. Dissolved substances are smaller than the pores in the filter paper and so will pass through with the liquid.
Keywords
Filtration - a process that separates insoluble substances from a liquid using a filter
Filter paper - placed inside the filter funnel to separate the insoluble solid from the liquid in the mixture
Filter funnel - is cone-shaped with a tube, and is placed in the top of the conical flask when filtering.
Residue - the insoluble solid collected in the filter paper
Filtrate - the liquid separated from the insoluble solid
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