Topic 5 Chemical reactions Chemistry Unit C2 Discovering chemistry Edexcel gcse additional science

Doc Brown's Edexcel GCSE Science-Chemistry Revision Notes

EDEXCEL GCSE Additional Science GCSE Chemistry Unit C2 Discovering chemistry STUDY NOTES

Chemistry Unit C2 Topic 6 Quantitative chemistry Revision Notes

6.1 Be able to calculate relative formula mass given relative atomic masses.
6.2 Be able to calculate the formulae of simple compounds from reacting masses and understand that these are empirical formulae.
6.3 Be able to determine the empirical formula of a simple compound, such as magnesium oxide.
6.4 Be able to calculate the percentage composition by mass of a compound from its formula and the relative atomic masses of its constituent elements.
6.5 HT only: Be able to use balanced equations to calculate masses of reactants and products.
6.6 Know that the yield of a reaction is the mass of product obtained in the reaction.
6.7 Be able to demonstrate an understanding that the actual yield of a reaction is usually less than the yield calculated using the chemical equation (theoretical yield).
6.8 Be able to calculate the percentage yield of a reaction from the actual yield and the theoretical yield.
6.9 Be able to demonstrate an understanding of the reasons why reactions do not give the theoretical yield due to factors, including:
- a) incomplete reactions
- b) practical losses during the preparation
- c) competing, unwanted reactions
6.10 Be able to demonstrate an understanding that many reactions produce waste products which:
- a) are not commercially useful
- b) can present economic, environmental and social problems for disposal
6.11 HT only: Be able to demonstrate an understanding that chemists in industry work to find the economically most favourable reactions where:
- a) the percentage yield is high
- b) all the products of the reaction are commercially useful
- c) the reaction occurs at a suitable speed
Revision Notes and Quizzes to help you revise
- Edexcel GCSE Additional Science Chemistry
- When revising, these pages provide you with a summary of what you need to know and be able to do.
- BUT remember, your primary source of revision are your class notes, investigations and Edexcel GCSE science textbooks.
- Calculating relative formula/molecular mass (M_r) of a compound or element molecule
  - Type in answer quiz on relative formula mass
  - Multiple Choice quiz on relative formula mass
- Empirical formula and formula mass of a compound from reacting masses (easy start, not using moles)
  - Working out formula from reacting masses type in answer QUIZ
  - Working out formula from reacting masses multiple choice QUIZ
- Composition by percentage (%) mass of elements in a compound
  - % composition type in answer QUIZ
  - % composition multiple choice QUIZ
- Reacting mass ratio calculations of reactants and products and brief mention of actual percent % yield and theoretical yield, atom economy and formula mass determination
  - Type in answer QUIZ on reacting masses
  - Multiple choice QUIZ on reacting masses
- Other calculations e.g. % purity, % percentage & theoretical yield

EDEXCEL GCSE Additional Science CHEMISTRY 2 UNIT 2 C2 Discovering chemistry INDEX

ALL Edexcel GCSE Science Units: Edexcel GCSE Science Biology Unit B1 Influences on life

Edexcel GCSE Science Biology Unit B2 The components of life * Edexcel GCSE Science Unit B3 Using biology

Edexcel GCSE Science Unit C1 Chemistry in our world * Edexcel GCSE Science Unit C2 Discovering Chemistry

Edexcel GCSE Science Unit C3 Chemistry in action * Edexcel GCSE Science Unit P1 Universal Physics

Edexcel GCSE Science Unit P2 Physics for your future * Edexcel GCSE Science Unit P3 Applications of Physics

GCSE Science-Chemistry courses AQA GCSE Science A CHEMISTRY * EDEXCEL GCSE Science CHEMISTRY

OCR GCSE 21st Century Science A CHEMISTRY * OCR GCSE Gateway Science B CHEMISTRY

WJEC GCSE Science-CHEMISTRY * Northern Ireland CCEA GCSE Science-CHEMISTRY

** Doc Brown's Edexcel GCSE Chemistry Revision







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