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Introducing chemical reactions

Introducing chemical reactions

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Question 1

The balanced chemical equation for the reaction between magnesium and hydrochloric acid is:

Mg+2HCl→MgCl2+H2 \text{Mg} + 2\text{HCl} \rightarrow \text{MgCl}_2 + \text{H}_2 Mg+2HCl→MgCl2​+H2​

In an experiment, a student reacts 0.3 mol0.3\text{ mol}0.3 mol of magnesium, Mg\text{Mg}Mg, with 0.4 mol0.4\text{ mol}0.4 mol of dilute hydrochloric acid, HCl\text{HCl}HCl.

Use the equation to show that the magnesium is in excess.

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Markscheme

Introducing chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /Introducing chemical reactions

55 exam-style questions on OCR GCSE Chemistry Introducing chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.

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