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2017 WAEC Chemistry Practical All your burette readings (initials and final), as well as the size of your pipette, must...

Chemistry
WAEC 2017

All your burette readings (initials and final), as well as the size of your pipette, must be recorded but no account of experimental procedure is required. All calculations must be done in your answer booklet.

State what would be observed if the following reactions are carried out in the laboratory:

(i) methyl orange is dropped into a solution of lime juice:

(ii) hydrogen sulphide gas is bubbled through Iron (III) chloride solution:

(iii) sulphur (IV) oxide gas is bubbled into acidified solution of KMnO\(_4\):

(iv) ethanoic acid is added to a solution of Ka\(_2\)CO\(_3\)

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Explanation

(a)(i) Solution of lime juice turns to pink or red,

(ii) The FeCl\(_3\) solution changes colour from brown to green and a yellow deposit.

(iii) The purple colour of KmnO\(_4\) solution turns colourless or decolourised.

(iv) The solution of K\(_2\)CO\(_3\) reacts with the addition of ethanoic acid to evolve a colourless, odourless gas with bubbling or effervescence 


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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789

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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
Join your school's WhatsApp group
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO June/July 2024 - Get offline past questions & answers - Download objective & theory, all in one app 48789
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709