a.) Fractional crystallization.
b.) Common salt is a mixture of sodium chloride and calcium chloride. Calcium chloride in common salt absorbs moisture therefore making it wet.
eddynightsy answered the question on May 2, 2018 at 08:30
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Starting from calcium carbonate, describe how a solid sample of calcium sulphate can be prepared.
(Solved)
Starting from calcium carbonate, describe how a solid sample of calcium sulphate can be prepared.
Date posted:
May 2, 2018
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Answers (1)
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A form four student accidentally mixed sodium carbonate and calcium carbonate. Describe how he would obtain a dry sample of sodium carbonate from the mixture.
(Solved)
A form four student accidentally mixed sodium carbonate and calcium carbonate. Describe how he would obtain a dry sample of sodium carbonate from the mixture.
Date posted:
May 2, 2018
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Answers (1)
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Explain how one would obtain pure sample of potassium carbonate crystals from a mixture of potassium carbonate and calcium carbonate.
(Solved)
Explain how one would obtain pure sample of potassium carbonate crystals from a mixture of potassium carbonate and calcium carbonate.
Date posted:
May 1, 2018
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Answers (1)
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In an attempt to prepare sulphur (IV) oxide gas, dilute sulphuric (VI) acid was reacted with calcium sulphate. The yield of sulphur (IV) oxide was...
(Solved)
In an attempt to prepare sulphur (IV) oxide gas, dilute sulphuric (VI) acid was reacted with calcium sulphate. The yield of sulphur (IV) oxide was found to be negligible. Explain.
Date posted:
May 1, 2018
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Answers (1)
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Describe how a sample of magnesium carbonate can be prepared using the following agents.
-Sodium carbonate
-Magnesium oxide
-Dilute hydrochloric acid
(Solved)
Describe how a sample of magnesium carbonate can be prepared using the following agents.
-Sodium carbonate
-Magnesium oxide
-Dilute hydrochloric acid
Date posted:
May 1, 2018
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Answers (1)
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Describe how a solid sample of lead (II) sulphate would be prepared using the following reagents.
. dilute nitric (V) acid
. solid lead (II) carbonate
. dilute...
(Solved)
Describe how a solid sample of lead (II) sulphate would be prepared using the following reagents.
. dilute nitric (V) acid
. solid lead (II) carbonate
. dilute sulphuric (VI) acid
Date posted:
May 1, 2018
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Answers (1)
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A sample of copper turning was found to be contaminated with copper ii oxide.describe how copper metal can be separated from the mixture
(Solved)
A sample of copper turning was found to be contaminated with copper ii oxide.describe how copper metal can be separated from the mixture
Date posted:
May 1, 2018
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Answers (1)
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A solution of tetrachloromethane burns colourless when propene gas is bubbled through it . What type of reaction takes place?
(Solved)
A solution of tetrachloromethane burns colourless when propene gas is bubbled through it. What type of reaction takes place?
Date posted:
May 1, 2018
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Answers (1)
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What is meant by the following as used in chemistry. (i) Solubility (ii) Saturated solution
(Solved)
What is meant by the following as used in chemistry.
i.) Solubility
ii.) Saturated solution
Date posted:
April 30, 2018
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Answers (1)
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Suggest a reason why BaSO4(a pigment made from sulphuric acid) would be
suitable in making paint for cars.
(Solved)
Suggest a reason why BaSO4(a pigment made from sulphuric acid) would be
suitable in making paint for cars.
Date posted:
April 29, 2018
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Answers (1)
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What are the properties of alpharadiation?
(Solved)
What are the properties of alpha radiation?
Date posted:
April 26, 2018
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Answers (1)
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What is an Isotope?
(Solved)
What is an Isotope?
Date posted:
April 24, 2018
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Answers (1)
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Why are anesthetics useful in medicine?
(Solved)
Why are anesthetics useful in medicine?
Date posted:
April 24, 2018
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Answers (1)
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Nitric v acid is manufactured by catalytic oxidation of ammonia gas (a) Name two raw materials other than ammonia that are used to manufacture the acid.....
(Solved)
Nitric v acid is manufactured by catalytic oxidation of ammonia gas
a. Name two raw materials other than ammonia that are used to manufacture the acid
b. Name the catalyst used.
c. Write an equation for reaction between nitric v acid and ammonia gas
d. sate one use of product in c
Date posted:
April 24, 2018
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Answers (1)
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A mixture contains iron(III)chloride, zinc(II)oxide and potassium chloride. Describe how each of the substance can be obtained from the mixture
(Solved)
A mixture contains iron(III)chloride,zinc(II)oxide and potassium chloride. Describe how each of the substance can be obtained from the mixture.
Date posted:
April 23, 2018
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Answers (1)
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A sample of calcium chloride is contaminated with anhydrous aluminum chloride. Explain how a sample of calcium chloride can be obtained from the mixture
(Solved)
A sample of calcium chloride is contaminated with anhydrous aluminum chloride. Explain how a sample of calcium chloride can be obtained from the mixture
Date posted:
April 23, 2018
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Answers (1)
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Substance Q has a melting point of 15°C and boiling point of 70°c.
(a)On the same axis,draw the melting point and boiling point graph for Q...
(Solved)
Substance Q has a melting point of 15°C and boiling point of 70°c.
(a)On the same axis,draw the melting point and boiling point graph for Q and the room temperature.
(b)State the physical state of substance Q at room temperature.
Date posted:
April 22, 2018
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Answers (1)
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Octane and ethanol are liquids at a room temperature. Ethanol is soluble in water while octane is insoluble. Explain how water can be used to...
(Solved)
Octane and ethanol are liquids at a room temperature. Ethanol is soluble in water while octane is insoluble. Explain how water can be used to separate the mixture of octane and ethanol.
Date posted:
April 22, 2018
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Answers (1)
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Explain why ammonium trioxocarbonate (iv) leaves no residue when heated
(Solved)
Explain why ammonium trioxocarbonate (iv) leaves no residue when heated
Date posted:
April 22, 2018
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Answers (1)
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Write chemical equation for reaction between dry hydrogen gas and heated lead (ii) oxide
(Solved)
Write chemical equation for reaction between dry hydrogen gas and heated lead (ii) oxide.
Date posted:
April 21, 2018
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Answers (1)