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chemistry
C1
Filtration,evaporation and crystalisation
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Cards (18)
What techniques can separate solids from liquids?
Filtration
,
evaporation
, and
crystallization
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What is a mixture of a liquid and an insoluble solid called?
A
mixture
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What do we call a liquid with a soluble solid dissolved in it?
A
solution
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In a solution, what is sodium chloride referred to as?
Solute
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What is the role of water in a solution of sodium chloride?
Solvent
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What is the purpose of filtration in separating solids from liquids?
To separate
insoluble
solids from liquids
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How does filter paper function in the filtration process?
It allows
liquids
to pass but not
solids
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What is the first step in the evaporation process?
Place the solution in an
evaporating dish
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What happens to the solvent during evaporation?
It evaporates, leaving
concentrated
solution
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What is a disadvantage of using evaporation for separating solids?
Some solids may
decompose
when heated
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What is thermal decomposition?
Breaking down
solids
when heated
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What is the first step in the crystallization process?
Place the solution in an
evaporation
dish
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How is crystallization different from evaporation?
It uses gentler heating to avoid
decomposition
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What happens as the solution cools during crystallization?
More
crystals
start to form
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What is the final step after filtering crystals from the solution?
Dry
the
crystals
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How can you dry the crystals after crystallization?
Leave them warm or use an
oven
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What are the steps involved in the evaporation process?
Place solution in
evaporating dish
Heat gently with
bunsen burner
Solvent evaporates, solution
concentrates
Crystals form as solution becomes
saturated
Collect dry crystals
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What are the steps involved in the crystallization process?
Place solution in
evaporation dish
Heat gently, possibly using a
water bath
Stop heating when
crystals
start forming
Allow solution to cool for more crystals
Filter
out crystals from solution
Dry the crystals
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