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6.3 Interpreting and interacting with earth systems

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Question 5

A scientist uses dilute sulfuric acid to investigate a 12.5 g sample taken from a marble statue.

The sample contains 88.0% calcium carbonate by mass. The remaining substances do not react with the acid.

The calcium carbonate reacts completely:

CaCO3+H2SO4→CaSO4+H2O+CO2 \mathrm{CaCO_{3} + H_{2}SO_{4} \rightarrow CaSO_{4} + H_{2}O + CO_{2}} CaCO3​+H2​SO4​→CaSO4​+H2​O+CO2​

Relative atomic mass (ArA_rAr​): C = 12 O = 16 Ca = 40

Calculate the maximum mass of carbon dioxide released from the sample.

[3]
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6.3 Interpreting and interacting with earth systems Questions

  1. GCSE
  2. /Chemistry
  3. /6.3 Interpreting and interacting with earth systems

109 exam-style questions on OCR GCSE Chemistry 6.3 Interpreting and interacting with earth systems, covering 6.3.1 Formation and evolution of the atmosphere, 6.3.2 The greenhouse effect and climate change, 6.3.3 Sources and problems of atmospheric pollutants, and 6.3.4 Producing potable water. Each one has a worked solution and a mark scheme showing where the marks go.

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