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1.1 Formulae, equations and hazards

1.1 Formulae, equations and hazards

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Question 23

In a laboratory preparation of chlorine gas, solid potassium dichromate(VI) (K2Cr2O7\text{K}_2\text{Cr}_2\text{O}_7K2​Cr2​O7​) reacts with concentrated hydrochloric acid (HCl\text{HCl}HCl) to form potassium chloride (KCl\text{KCl}KCl), chromium(III) chloride (CrCl3\text{CrCl}_3CrCl3​), chlorine gas (Cl2\text{Cl}_2Cl2​), and water (H2O\text{H}_2\text{O}H2​O).

Write the balanced chemical equation for this reaction.

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Markscheme

1.1 Formulae, equations and hazards Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 Formulae, equations and hazards

230 exam-style questions on Edexcel GCSE Chemistry 1.1 Formulae, equations and hazards, covering 1.1.1 Formulae, word and balanced equations, 1.1.2 Balanced ionic equations, and 1.1.3 Hazard symbols and risk in practical work. Each one has a worked solution and a mark scheme showing where the marks go.

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