Topic 2 Quantitative analysis Chemistry Unit C3 Chemistry in action Edexcel gcse separate triple award science

Doc Brown's Edexcel GCSE Science-Chemistry Revision Notes

EDEXCEL GCSE Chemistry Unit C3 Chemistry in action STUDY NOTES

Chemistry Unit C3 Topic 2 Quantitative analysis Revision Notes

2.1 Be able to calculate the concentration of solutions in g dm^-3
2.2 Be able to demonstrate an understanding that some areas of the country have dissolved calcium or magnesium ions in their tap water and that the presence of these ions makes the water hard.
2.3 Describe problems caused by hard water, including:
- a) it does not easily form a lather with soap
- b) it reacts with soap to form a precipitate (“scum”), which causes soap to be wasted
2.4 Describe hard water as either temporary or permanent, and describe how boiling removes temporary hardness but not permanent hardness.
2.5 Be able to explain how hard water can be softened by removing the dissolved calcium and/or magnesium ions and that this can be done by:
- a) boiling (for temporary hard water only)
- b) using an ion exchange resin
2.6 Revise the investigation to evaporate a solution to dryness to determine the mass of solute in a given mass of solution.
2.7 HT only: Be able to demonstrate an understanding that the amount of a substance can be measured in grams, numbers of particles or number of moles of particles.
2.8 HT only: Be able to convert masses of substances into moles of particles of the substance and vice versa.
2.9 HT only: Be able to convert concentration in g dm^-3 into mol dm^-3 and vice versa.
2.10 Be able to demonstrate an understanding that if soluble salts are prepared from an acid and an insoluble reactant:
- a) excess of the reactant can be added to ensure that all the acid is used up
- b) the excess reactant can be removed by filtration
- c) the solution remaining is only salt and water
2.11 Be able to demonstrate an understanding that if soluble salts are prepared from an acid and a soluble reactant:
- a) titration must be used to determine the exact amount of the soluble reactant that reacts with an acid
- b) the acid and the soluble reactant can then be mixed in the correct proportions
- c) the solution remaining after reaction is only salt and water
2.12 Be able to describe an acid-base titration as a neutralisation reaction where hydrogen ions (H⁺) from the acid react with hydroxide ions (OH^-) from the base.
2.13 Be able to describe how to carry out simple acid-base titrations using burette, pipette and suitable acid-base indicators.
2.14 Revise how to carry out an acid-base titration to prepare a salt from a soluble base.
2.15 HT only: Be able to carry out simple calculations using the results of titrations to calculate an unknown concentration of a solution or an unknown volume of solution required.
Revision Notes and Quizzes to help you revise
- Edexcel GCSE 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.
- Water Chemistry Notes - water treatment, hard and soft water, soaps
- Introducing moles: The connection between moles, mass and formula mass
  - Introduction to moles type in answer QUIZ
  - Introduction to moles multiple choice QUIZ
- Molarity, volumes and solution concentrations (and diagrams of apparatus)
  - Molarity type in answer QUIZ
  - Molarity multiple choice QUIZ
- Volumetric titration calculations e.g. acid-alkali titrations (and diagrams of apparatus)
  - Titration type in answer QUIZ
  - Titration multiple choice QUIZ
- Methods of making salts

EDEXCEL GCSE Science CHEMISTRY 3 UNIT 3 C3 Chemistry in action 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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