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(a) Chlorine gas
(b) HCl(aq) + MnO2---------->MnCl2(aq) + Cl2(g) + 2H2(g)
(c) The petals turn to white due to the bleaching effect of NaOCl(sodium hypochlorite)
maurice.mutuku answered the question on October 24, 2019 at 10:04
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The following diagram represents a set-up that can be used in the laboratory to prepare and collect a sample of chlorine gas:
Date posted: October 24, 2019. Answers (1)
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Explain
Date posted: October 24, 2019. Answers (1)
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Date posted: October 24, 2019. Answers (1)
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(a) Name solid V
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Date posted: October 24, 2019. Answers (1)
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In the manufacture of Sulphuric (VI) acid by contact process sulphur (IV) oxide is made to react with air to form sulphur (VI) oxide as shown:-
(i) Name the catalyst in this reaction
(ii) State and explain the effect of the following changes on the yield of sulphur (VI) oxide
I. Increasing the pressure
II. Using a catalyst
(iii) Explain why sulphur (VI) oxide gas is absorbed in concentrated sulphur (VI) acid before dilution
Date posted: October 24, 2019. Answers (1)
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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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The diagrams below represent two allotropes of Sulphur. Study them and answer the questions which follow:-
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(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)
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(i) Write an equation for the reaction.
(ii) Calculate the number of moles of sulphur (IV) oxide and oxygen used at R.T.P.
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(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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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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(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)