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Version 2.0 Copyright © AQA and its licensors. All rights reserved. C1.2.1 Calcium Carbonate.

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Presentation on theme: "Version 2.0 Copyright © AQA and its licensors. All rights reserved. C1.2.1 Calcium Carbonate."— Presentation transcript:

1 Version 2.0 Copyright © AQA and its licensors. All rights reserved. C1.2.1 Calcium Carbonate

2 Using Exam pro items to support successful outcomes Version 2.0 Copyright © AQA and its licensors. All rights reserved. Learners will be able to test their progress against learning outcomes using questions fro past AQA GCSE examinations

3 Foundation Tier C1 June 12, 4 1. Version 2.0 Copyright © AQA and its licensors. All rights reserved. a (i) (ii) b

4 1b continued Version 2.0 Copyright © AQA and its licensors. All rights reserved.

5 Mark scheme Version 2.0 Copyright © AQA and its licensors. All rights reserved. QAnswerExtra InformationMark 1 (a) (i) Bubble the gas through limewater/calcium hydroxide solution allow (add) limewater. Test must be correct to gain result mark 1 1 (a) (ii)(the solution) goes cloudyAllow milky 1 1 bAdvantage- quarrying limestone provides building materials, employment and new road links Disadvantage- quarrying limestone releases dust, and lorries release carbon dioxide from burning fossil fuel 1111 Total 4

6 Higher Tier C1 June 12, 5 Version 2.0 Copyright © AQA and its licensors. All rights reserved. 1

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10 Mark scheme- Higher tier Version 2.0 Copyright © AQA and its licensors. All rights reserved. QAnswerExtra InformationMark 1 (a) (i) Water Accept hydrogen oxide Allow H 2 O 1 1 (a) (ii)Carbon dioxideAllow CO 2 Accept any soluble carbonate or carbonic acid 1 1 b (i) CaCO HCl CaCl 2 + CO 2 + H 2 O 1 1 b (ii) Because sulfur reacts with oxygen/air to produce sulfur dioxide or sulfur burns to produce sulfur dioxide And (sulfur dioxide) causes acid rain that reacts with/erodes limestone/calcium carbonate Accept correct equation Ignore wears away c (i) Because carbon dioxide is produced from burning methane Because carbon dioxide is produced from decomposing calcium carbonate/limestone Accept correct equation Do not accept carbon in calcium carbonate reacting with air 1111

11 Mark scheme- Higher continued Version 2.0 Copyright © AQA and its licensors. All rights reserved. QAnswerExtra InformationMark 1 c (i) Because carbon dioxide is produced from burning methane Because carbon dioxide is produced from decomposing calcium carbonate/limestone Accept correct equation Do not accept carbon in calcium carbonate reacting with air c (ii) Nitrogen This is the main gas/75-80%/of air Allow there is a lot of this gas in air 1111 Total 9

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