Heat the mixture , Ammonium chloride Sublimes, Add water to the remaining mixture, and filter out lead II chloride as the residue then evaporate the filtrate to saturation point. Allow 15 minutes cool and then filter out the crystals of sodium chloride.
sharon kalunda answered the question on May 22, 2019 at 06:52
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The diagram below represents an arrangement for a large scale manufacture of ethanol for domestic consumption.
(i) Name the process by which ethanol is obtained from...
(Solved)
The diagram below represents an arrangement for a large scale manufacture of ethanol for domestic consumption.
(i) Name the process by which ethanol is obtained from the crude oil.
(ii) Suggest two reasons why water is a coolant in this process.
(iii) Why is it possible to separate ethanol from the mixture by this process.
Date posted:
May 22, 2019
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Answers (1)
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In an experiment, a few drops of concentrated nitric (IV)acid were added to aqueous Iron (II)
sulphate in a test tube. excess sodium hydroxide solution was...
(Solved)
In an experiment, a few drops of concentrated nitric (IV)acid were added to aqueous Iron (II)
sulphate in a test tube. excess sodium hydroxide solution was then added to the mixture.
(a) State the observations that were made when:
(i) Concentrated nitric (V) acid was added to aqueous Iron (II) sulphate.
(ii) Excess sodium hydroxide was added to the mixture.
(b) Write an ionic equation for the reaction that occurred in a(ii) above.
Date posted:
May 22, 2019
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Answers (1)
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The set up below was used to investigate a chemical property of carbon. Study it and answer
the questions that follow.
(i) What observations were made on...
(Solved)
The set up below was used to investigate a chemical property of carbon. Study it and answer
the questions that follow.
(i) What observations were made on heating the mixture.
(ii) What is the industrial application of carbon in terms of property investigated
above.
Date posted:
May 22, 2019
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Answers (1)
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Identify the type of bond formed in (i) and (ii) .
(Solved)
Identify the type of bond formed in (i) and (ii) .
Date posted:
May 22, 2019
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Answers (1)
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Zinc carbonate decomposes on heating producing a gaseous product and a residue. What
volume of the gaseous product at s.t.p is produced from 2.5 g of...
(Solved)
Zinc carbonate decomposes on heating producing a gaseous product and a residue. What
volume of the gaseous product at s.t.p is produced from 2.5 g of the carbonate? ( Zn = 65,
C=12,O=16 M.G.V at s.t.p = 22400cm3)
Date posted:
May 22, 2019
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Answers (1)
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If aqueous lead (II) nitrate is added to aqueous solution potassium iodide, a bright yellow
precipitate is formed.
(i) Write down the formula of the precipitate formed.
(ii)...
(Solved)
If aqueous lead (II) nitrate is added to aqueous solution potassium iodide, a bright yellow
precipitate is formed.
(i) Write down the formula of the precipitate formed.
(ii) Write an ionic equation for the reaction above.
Date posted:
May 22, 2019
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Answers (1)
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The diagram below shows a set-up of apparatus used to separate miscible liquids.
(a) Name the parts labelled A and B
(b) State the function of...
(Solved)
The diagram below shows a set-up of apparatus used to separate miscible liquids.
(a) Name the parts labelled A and B
(b) State the function of the part labeled A.
(c) State the property of the mixture that makes it suitable to be separated by the
method above.
Date posted:
May 22, 2019
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Answers (1)
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Give any two uses of ethene gas
(Solved)
Give any two uses of ethene gas
Date posted:
May 22, 2019
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Answers (1)
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A volume of 80cm3 of a mixture of propane (C3H8) and oxygen were ignited in an experiment.The products were cooled and passed through an aqueous...
(Solved)
A volume of 80cm3 of a mixture of propane (C3H8) and oxygen were ignited in an experiment.The products were cooled and passed through an aqueous sodium hydroxide. The final volume
was reduced by 30cm3
a) Write the equation for the combustion of propane
b) Determine the volume of;
i) The component of the original mixture
ii) Residual oxygen
Date posted:
May 21, 2019
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Answers (1)
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Differentiate between empirical and molecular formula
(Solved)
Differentiate between empirical and molecular formula
Date posted:
May 21, 2019
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Answers (1)
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Draw the structural formula of ethanoic acid
(Solved)
Draw the structural formula of ethanoic acid
Date posted:
May 21, 2019
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Answers (1)
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Give a reasons why ethanoic acid has a higher boiling point than ethanol which has the same
number of Carbon atoms
(Solved)
Give a reasons why ethanoic acid has a higher boiling point than ethanol which has the same
number of Carbon atoms
Date posted:
May 21, 2019
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Answers (1)
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Define oxidation and reduction in terms of electrons.
(Solved)
Define oxidation and reduction in terms of electrons.
Date posted:
May 21, 2019
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Answers (1)
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75g of a saturated solution contains 30g of salt calculate
a) The solubility of the salt
b) The percentage of the salt in the saturated solution
(Solved)
75g of a saturated solution contains 30g of salt calculate
a) The solubility of the salt
b) The percentage of the salt in the saturated solution
Date posted:
May 21, 2019
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Answers (1)
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Three brands of inks M, N and O were suspected to be contaminated with substance P.
The result is shown below;
i) Which ink was contaminated with...
(Solved)
Three brands of inks M, N and O were suspected to be contaminated with substance P.
The result is shown below;
i) Which ink was contaminated with substance P
ii) Name the ink which was pure
iii) Identify the other ink which was not pure
Date posted:
May 21, 2019
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Answers (1)
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Name three sub – atomic particles found in an atom and state where they are found
(Solved)
Name three sub – atomic particles found in an atom and state where they are found
Date posted:
May 21, 2019
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Answers (1)
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A fixed mass of an ideal gas occupies 200cm3 at a pressure of 740 mmHg.Calculate the volume of the gas at 77-mmHg pressure.
(Solved)
A fixed mass of an ideal gas occupies 200cm3 at a pressure of 740 mmHg.Calculate the volume of the gas at 77-mmHg pressure.
Date posted:
May 21, 2019
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Answers (1)
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Sulphur is soluble in ethanol but not in water while common salt is soluble in water but not in
ethanol
a) Explain why sulphur is soluble in...
(Solved)
Sulphur is soluble in ethanol but not in water while common salt is soluble in water but not in
ethanol
a) Explain why sulphur is soluble in ethanol but hot in water.
b) Explain how a pure sample of sodium chloride can be obtained from a mixture of the two.
Date posted:
May 21, 2019
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Answers (1)
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Explain why potassium is kept under paraffin while phosphorous is kept under water
(Solved)
Explain why potassium is kept under paraffin while phosphorous is kept under water
Date posted:
May 21, 2019
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Answers (1)
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The table below shows the ammeter reading obtained when two different electrolytes of the same concentration were tested.
(Solved)
The table below shows the ammeter reading obtained when two different electrolytes of the same concentration were tested.
Why does ethanoic acid give a lower reading?
Date posted:
May 21, 2019
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Answers (1)