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a) Method of collection is wrong.Should be collected by downward delivery/upward
displacement of air since the gas is denser than air.
b) Na2SO3(s) + H2SO4(aq)------->Na2SO4(aq) + SO2(g) + H2O(l)
c) By passing it through calcium hydroxide in which the gas dissolves.
maurice.mutuku answered the question on October 24, 2019 at 06:33
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(i) Is concentrated sulphuric acid a weak acid or a strong acid?
(ii) Explain your answer in (i) above.
Date posted: October 24, 2019. Answers (1)
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(b) Determine the volume of commercial acid in (a) above that can...(Solved)
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(a) Calculate the molarity of this acid
(b) Determine the volume of commercial acid in (a) above that can be used to prepare
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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)
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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
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(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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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 22, 2019. Answers (1)
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The diagram below is a set-up used in preparation of ammonia solution. Study it and answer the questions that follow
(i) What is the purpose of the filter funnel in the set-up above?
(ii) What would happen if a delivery tube was used in place of the filter funnel?
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Date posted: October 22, 2019. Answers (1)
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The diagram below is a set-up for preparation and collection of a gas. Study it answer the questions that follow:
(i) Identify gas X
(ii) Write an equation for the formation of gas X
(iii) What precaution should be observed when preparing gas X by the above method?
(iv) Describe the suitable drying agent for gas X
(v) How can one confirm that the gas collected is gas X?
(vi) State two physical properties of gas X
Date posted: October 22, 2019. Answers (1)
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(a) What is the purpose of the sodium hydroxide?
(b) Write an equation for the reaction taking place in chamber II
(c) The nitrogen gas obtained is not pure. Explain
Date posted: October 22, 2019. Answers (1)
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The final concentration of the acid was found to be 0.1M. Give...(Solved)
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Date posted: October 22, 2019. Answers (1)
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(i) Solution A
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Date posted: October 22, 2019. Answers (1)
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A student wanted to prepare a sample of ammonia...(Solved)
Ammonia gas is prepared in the laboratory by the action of an alkali on an ammonium salt.
A student wanted to prepare a sample of ammonia gas in the laboratory.
(a) Give one alkali that can be used in the above experiment
(b) Write an equation for the reaction that takes place in the above experiment
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