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

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 3 + 2 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 1111 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 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 1111 1 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