(a)(i)substance X-Iron (ii) Sulphate
(ii)substance Y-Iron filling /sulphur powder mixture
(b)(i)Gas J- Hydrogen sulphide
(ii)Gas K-Hydrogen gas
(c)Gas J-$FeS{(s)}+2HCL{(aq)}\rightarrow FeCL_2{(aq)} + H_2S{(g)}$
Gas K-$Fe(s)+2HCL{(aq)}\rightarrow FeCL_2{(aq)} + H_2(g)$
isaacmuthini answered the question on November 23, 2017 at 09:56
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A mixture of pentanic acid and pentane were shaken with 0.5mol/l potassium hydroxide solution and let to separate as shown in the diagram below
(Solved)
A mixture of pentanic acid and pentane were shaken with 0.5mol/l potassium hydroxide solution and let to separate as shown in the diagram below
(I)Name the main component in layer V
(II)Give reason for your answer in (I) above
Date posted:
November 23, 2017
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Answers (1)
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The diagram below represents an experiment carried out in the laboratory.Study it carefully and answer the questions that follow
(Solved)
The diagram below represents an experiment carried out in the laboratory.Study it carefully and answer the questions that follow
(a)Why is it necessary to boil to boil the water
(b)Identify gas A
(c)After the experiment,blue and red litmus paper were dropped into the water.Explain what was observed
(d)Write a chemical equation for the production of gas A
Date posted:
November 23, 2017
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Answers (1)
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Study the scheme below and answer the questions that follow:
(Solved)
Study the scheme below and answer the questions that follow:
Name;
(i)solid P
(ii)Yellow residue M
(iii)Write a balanced equation for the decomposition of solid P
Date posted:
November 23, 2017
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Answers (1)
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Study the set up below
(Solved)
Study the set up below
(a)Name gas G
(b)Write a balanced equation for the formation of gas G
(c)Name the type of reaction where ultra-violet light energy is part of the reaction
Date posted:
November 23, 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 chromatogram of different pigments of leaf extract
(Solved)
The diagram below represents a chromatogram of different pigments of leaf extract
(a)Name a suitable solvent for the dye.
(b)State with a reason,the least soluble pigment in the solvent used.
Date posted:
November 22, 2017
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Answers (1)
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1.2 liters of hydrogen gas produced at room temperature and pressure when 3.27 g of zinc was used.Determine the...
(Solved)
1.2 liters of hydrogen gas produced at room temperature and pressure when 3.27 g of zinc was used. Determine the relative atomic mass of zinc.
Date posted:
November 22, 2017
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Answers (1)
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Study the flow chart below and answer questions that follow.
(Solved)
Study the flow chart below and answer questions that follow.
(a)Identify the following;
solid T
Gas L
(b)Describe how process V is carried out.
Date posted:
November 22, 2017
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Answers (1)
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Study the set up below and answer the questions that follow;
(Solved)
Study the set up below and answer the questions that follow;
(a)Identify gas D
(b)Write an equation for the reaction taking place
In the combustion tube
Date posted:
November 22, 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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Study the set up below and answer questions that follow. State and explain the observations that would be made when the circuit is completed.
(Solved)
Study the set up below and answer questions that follow.
State and explain the observations that would be made when the circuit is completed.
Date posted:
November 22, 2017
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Answers (1)
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The diagram below shows part of the solvay process.
(Solved)
The diagram below shows part of the solvay process.
(a)Name solid X
(b)State the process taking place in chamber C
Date posted:
November 22, 2017
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Answers (1)
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Below is an ionic electronic structure of element X.
(Solved)
Below is an ionic electronic structure of element X.
Write down the:
(i)Period in which X belong
(ii)Formula of its chloride
Date posted:
November 22, 2017
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Answers (1)
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Study the flow chart below and answer the questions that follow (a)Name substances: (i)P (ii)colourless gas (b)Write balanced stoichiometric equation for the reaction:
(Solved)
Study the flow chart below and answer the questions that follow
(a)Name substances:
(i)P
(ii)colourless gas
(b)Write balanced stoichiometric equation for the reaction:
(i)Thermal decomposition of P
(ii)Producing coloourless solution S
(c)Write the ionic equations for the formation of Solid P
(d)Name process B
Date posted:
November 22, 2017
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Answers (1)
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Calculate the normality of a solution containing 3.15g of hydrated oxalic axid (H2C2O4.2H2O) in 250ml of solution,take the molar mass to be 126
(Solved)
Calculate the normality of a solution containing 3.15g of hydrated oxalic axid (H2C2O4.2H2O) in 250ml of solution,take the molar mass to be 126
Date posted:
November 21, 2017
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Answers (1)
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State any two uses of hydrogen gas in the fertilizer industry
(Solved)
State any two uses of hydrogen gas in the fertilizer industry
Date posted:
November 20, 2017
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Answers (1)
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State the two types of elemental analysis and their definitions.
(Solved)
State the two types of elemental analysis and their definitions.
Date posted:
November 20, 2017
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Answers (1)
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State the Lewis concept
(Solved)
State the Lewis concept
Date posted:
November 20, 2017
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Answers (1)
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Explain how an increase in pressure would affect equilibrium position
(Solved)
Explain how an increase in pressure would affect equilibrium position
Date posted:
November 19, 2017
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Answers (1)
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Define entropy
(Solved)
Define entropy
Date posted:
November 18, 2017
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Answers (1)