Heat the solution and allow it to cool and filter the precipitate of potassium chloride since it only dissolves in hot water. Heat the remaining filtrate until crystals of sodium chloride start forming and give it time to cool in order to form more crystals.
sande kevin answered the question on January 1, 2018 at 09:35
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State and explain what is observed when a burning piece of magnesium is lowered into a gas jar containing dry chlorine gas
(Solved)
State and explain what is observed when a burning piece of magnesium is lowered into a gas jar containing dry chlorine gas
Date posted:
December 26, 2017
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Answers (1)
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Give the observations made when lead (ii)nitrate is heated strongly and write a balanced chemical equations to show the action
(Solved)
Give the observations made when lead (ii)nitrate is heated strongly and write a balanced chemical equations to show the action
Date posted:
December 21, 2017
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Answers (1)
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Carbon and silicon are in the same group of the periodic table. Silicon (iv) oxide melts at 2440°c while solid carbon (iv) oxide sublimes...
(Solved)
Carbon and silicon are in the same group of the periodic table. Silicon (iv) oxide melts at 2440°c while solid carbon (iv) oxide sublimes at -70°c. In terms of structure and bonding, explain this difference.
Date posted:
December 21, 2017
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Answers (1)
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Describe how a double aqueous ammonium ii sulphate can be prepared using the following reagents: aqueous ammonia,dilute sulphuric acid and iron metal.
(Solved)
Describe how a double aqueous ammonium ii sulphate can be prepared using the following reagents: aqueous ammonia, dilute sulphuric acid and iron metal.
Date posted:
December 18, 2017
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Answers (1)
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State and explain the observation that would be made when hydrogen chloride gas is bubbled into a solution of silver nitrate
(Solved)
State and explain the observation that would be made when hydrogen chloride gas is bubbled into a solution of silver nitrate.
Date posted:
December 17, 2017
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Answers (1)
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Between methanol and propanol, which has a higher boiling point?
(Solved)
Between methanol and propanol, which has a higher boiling point?
Date posted:
December 13, 2017
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Answers (1)
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Name any three parts of the Bunsen burner and their functions.
(Solved)
Name any three parts of the Bunsen burner and name their functions
Date posted:
December 3, 2017
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Answers (1)
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Apart from the Bunsen burner, name other sources of heat used in the laboratory.
(Solved)
Apart from the Bunsen burner, name other sources of heat used in the laboratory
Date posted:
December 3, 2017
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Answers (1)
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Give 3 apparatus used for measuring accurate specific volume of liquids.
(Solved)
Give 3 apparatus used for measuring accurate specific volume of liquids.
Date posted:
December 3, 2017
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Answers (1)
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Give the reasons why most laboratory apparatus are made of glass
(Solved)
Give the reasons why most laboratory apparatus are made of glass
Date posted:
December 3, 2017
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Answers (1)
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Name the uses of the following laboratory apparatus. Desiccator, Deflagrating spoon, Tongs and Crucible.
(Solved)
Name the uses of the following laboratory apparatus.
- Desiccator
- Deflagrating spoon
- Tongs
-Crucible.
Date posted:
December 3, 2017
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Answers (1)
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A piece of burning sulphur was lowered into a gas jar filled with oxygen and containing aqueous litmus solution as shown.
(Solved)
A piece of burning sulphur was lowered into a gas jar filled with oxygen and containing aqueous litmus solution as shown.
(a)State two observations made during the experiment.
(b)Write an equation for the burning xof sulphur in air.
Date posted:
November 28, 2017
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Answers (1)
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The diagram below shows some apparatus used in the laboratory
(Solved)
The diagram below shows some apparatus used in the laboratory
Name the apparatus and state their uses.
Date posted:
November 28, 2017
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Answers (1)
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The set up below shows the apparatus used for the preparation of nitrogen (i) oxide
(Solved)
The set up below shows the apparatus used for the preparation of nitrogen (i) oxide
(a)(i)Name solid X
(ii)What precautions is taken when heating solid X
(b)Nitrogen (i) oxide does not burn but a magnesium ribbon continues burning in the gas.Explain
Date posted:
November 27, 2017
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Answers (1)
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Study the table below and answer the questions that follow
(Solved)
Study the table below and answer the questions that follow
(i)Select a substance with a giant metallic structure.Explain
(ii)Substance A and C conduct electricity in molten state at room temperature.What is the difference in
their conductivity?
(iii)Select a substance which is in gaseous state.Explain
Date posted:
November 27, 2017
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Answers (1)
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The table below gives some properties of substances I,II,III and IV.Study it and answer the questions that follows
(Solved)
The table below gives some properties of substances I,II,III and IV.Study it and answer the questions that follows
What type of structure exist in substances?
I............................
II...........................
III..........................
IV...........................
Date posted:
November 24, 2017
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Answers (1)
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Study the reaction scheme below and answer the question that follow
(Solved)
Study the reaction scheme below and answer the question that follow
Name(i)Salt A
(ii)Process B
(iii)Solid C
(iv)Brown gas D
(v)Gas E
(VI)Salt in solution F
(VII)Precipitate G
(viii)complex ion in solution H
Date posted:
November 24, 2017
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Answers (1)
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The diagram below shows a set-up which was used by a student to investigate the effect of electricity on molten lead (ii)bromide before and after...
(Solved)
The diagram below shows a set-up which was used by a student to investigate the effect of electricity on molten lead (ii)bromide before and after heating the lead (II)bromide
(a)On heating lead (II) bromide,the bulb lit brightly.Before heating,the bulb did not light.
Explain
(b)Write ionic equations to show the reaction taking place on lead(II) bromide
(i)At the anode
(ii)At the cathode
(c)State and explain one important precaution that this student should have taken while performing this
experiment
Date posted:
November 23, 2017
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Answers (1)
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The diagram below represents a burning jiko.
(Solved)
The diagram below represents a burning jiko.
(a)Write down the equation for the reactions taking place at;
A.........................
B.........................
(b)Why is it dangerous to use a jiko in a closed room
Date posted:
November 22, 2017
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Answers (1)
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Name the first 10 elements of the periodic table of elements in their correct order.
(Solved)
Name the first 10 elements of the periodic table of elements in their correct order.
Date posted:
November 17, 2017
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Answers (1)