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(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
- 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. Answers (1)
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(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
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Date posted: November 23, 2017. Answers (1)
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Name;
(i)solid P
(ii)Yellow residue M
(iii)Write a balanced equation for the decomposition of solid P
Date posted: November 23, 2017. Answers (1)
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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. 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 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. Answers (1)
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Date posted: November 22, 2017. Answers (1)
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(Solved)
The table below shows PH values of solutions A,B,C and D
(a)Which solution Produces bubbles of a gas with zinc metal?Explain
(b)Which solution is the most likely to that of wood ash
Date posted: November 22, 2017. Answers (1)
- 1.2 liters of hydrogen gas produced at room temperature and pressure when 3.27 g of zinc was used.Determine the...(Solved)
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Date posted: November 22, 2017. Answers (1)
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(a)Identify the following;
solid T
Gas L
(b)Describe how process V is carried out.
Date posted: November 22, 2017. Answers (1)
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Date posted: November 22, 2017. Answers (1)
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(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. Answers (1)
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State and explain the observations that would be made when the circuit is completed.
Date posted: November 22, 2017. Answers (1)
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(a)Name solid X
(b)State the process taking place in chamber C
Date posted: November 22, 2017. Answers (1)
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Write down the:
(i)Period in which X belong
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Date posted: November 22, 2017. Answers (1)
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(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. Answers (1)
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Date posted: November 20, 2017. Answers (1)
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Date posted: November 20, 2017. Answers (1)
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