(i) Vanadium V oxide or platinised asbestos
(ii) I. The yield of SO3 increase because increase in pressure favour the forward reaction since less number of SO3
II. The yield of SO3 is the same because catalyst only speeds the rate at which equibrium.
(iii) Exothermic reaction occurs. When dissolved in water produce acid spray (fumes) cause pollution.
maurice.mutuku answered the question on October 24, 2019 at 08:31
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The set-up below was used to prepare dry sample of hydrogen sulphide gas
(a) (i) Complete the diagram to show how the gas was collected
(ii) Identify the following:-
I. Solid H
II. Solid I
(iii) Write an equation for the reaction that occurred in the flask between solid H and dilute Hydrochloric acid
(b) When hydrogen sulphide gas was passed through a solution of Iron (III) chloride, the following
observations were made:-
(i) the colour of the solution changed from reddish-brown to green and
(ii) a yellow solid was deposited
Explain the observation
Date posted: October 24, 2019. Answers (1)
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(i) Name the two allotropes labelled X and Y
(ii) (I) Explain why a piece of burning magnesium continues to burn in a gas jar of Sulphur (IV) Oxide
(II) Explain how one of the products formed in (I) above can be obtained from the mixture
Date posted: October 24, 2019. Answers (1)
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(i) Write an equation for the reaction.
(ii) Calculate the number of moles...(Solved)
6.0 dm3 of sulphur (IV) oxide were oxidized by oxygen to sulphur (VI) oxide.
(i) Write an equation for the reaction.
(ii) Calculate the number of moles of sulphur (IV) oxide and oxygen used at R.T.P.
(iii) Determine the volume of oxygen used.
(Molar volume of a gas at R.T.P. is 24.0 dm3)
Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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that follow:(Solved)
The set-up below is used to prepare dry sulphur (IV) Oxide in the laboratory. Answer questions
that follow:
(a) Identify the mistake in the set-up
(b) Write an equation for the reaction in the set-up
(c) State how the polluting effects of the gas on the environment can be controlled
Date posted: October 24, 2019. Answers (1)
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(ii) Explain your answer in (i) above.
Date posted: October 24, 2019. Answers (1)
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(a) Calculate the molarity of this acid
(b) Determine the volume of commercial acid in (a) above that can...(Solved)
Commercial sulphuric acid has a density of 1.8gcm3
(a) Calculate the molarity of this acid
(b) Determine the volume of commercial acid in (a) above that can be used to prepare
500cm3 of 0.2M H2SO4 solution
Date posted: October 24, 2019. Answers (1)
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Study the flow chart below and answer the questions that follow
(a) State the observation made when ammonia is passed over heated Copper (II) Oxide
(b) Identify:-
(i) Gas A
(ii) Liquid B
Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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When a few drops of aqueous ammonia were added to a colourless solution X, a white precipitate was formed. On addition of more aqueous ammonia, the white precipitate dissolved to a colourless solution Q
(a) Name the white precipitate formed
(b) Write formula of the complex ion present in the colourless solution Q
(c) Write an ionic equation for the formation of the white precipitate
Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
- When sulphur powder is heated to over 400oC the following changes are observed:-
At 113oC it melts into light brown liquid. The liquid then darkens to...(Solved)
When sulphur powder is heated to over 400oC the following changes are observed:-
At 113oC it melts into light brown liquid. The liquid then darkens to become reddish-brown
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Date posted: October 24, 2019. Answers (1)