Extracting pure salt from rock salt

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Extracting pure salt from rock salt
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Extracting pure salt from rock salt
Rock salt is a mixture of salt and sandy
impurities. To get the useful salt we must
separate it from these impurities.
ROCK SALT
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Step 1 Thinking safety
Put goggles on before starting this investigation.
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Step 2 Weighing out the rock salt
Place paper on the pan of the balance and zero
it. Use a spatula to add rock salt until 5.00g is
reached.
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Step 3 Crushing the rock salt
Crush the rock salt to a powder. This will make
it easier to dissolve the salt in step 4.
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Step 4 Dissolving the salt
Place the powder in a beaker and stir in 20cm3 of
water. Salt dissolves in water. The impurities
are insoluble. The orange particles which
represent the impurities stay together as a group
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Step 5 Filtering the salt solution
Pour the solution from the beaker through a
filter paper and funnel. Collect the filtered
solution in a conical flask.
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Step 5 Filtering the salt solution
Pour the solution from the beaker through a
filter paper and funnel. Collect the filtered
solution in a conical flask.
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Step 5 Filtering the salt solution
Particles of salt and water can pass through the
holes in the filter paper.
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Step 5 Filtering the salt solution
Particles of salt and water can pass through the
holes in the filter paper. The groups of
impurity particles are too big and are trapped in
the paper.
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Step 5 Filtering the salt solution
Particles of salt and water can pass through the
holes in the filter paper. The groups of
impurity particles are too big and are trapped in
the paper.
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Step 6 Evaporating the salt solution
Weigh an evaporating dish. Add the solution from
the conical flask to the dish and warm gently for
5 minutes.
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Step 6 Evaporating the salt solution
Weigh an evaporating dish. Add the solution from
the conical flask to the dish and warm gently for
5 minutes.
HEAT
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Step 6 Evaporating the salt solution
Weigh an evaporating dish. Add the solution from
the conical flask to the dish and warm gently for
5 minutes.
HEAT
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Step 6 Evaporating the salt solution
Weigh an evaporating dish. Add the solution from
the conical flask to the dish and warm gently for
5 minutes.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
Gently warming the salt solution boils off the
water, represented by blue particles.
HEAT
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Step 6 Evaporating the salt solution
The pure salt crystals are left in the
evaporating dish. Weigh the dish and calculate
the mass of salt you have extracted.