Topic 2 Ionic compounds and analysis 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 2 Ionic compounds and analysis Revision Notes

2.1 Be able to demonstrate an understanding that atoms of different elements can combine to form compounds by the formation of new chemical bonds.
2.2 Be able to describe how ionic bonds are formed by the transfer of electrons to produce cations and anions.
2.3 Be able to describe an ion as an atom or group of atoms with a positive or negative charge.
2.4 Be able to describe the formation of sodium ions, Na⁺, and chloride ions, Cl^-, and hence the formation of ions in other ionic compounds from their atoms, limited to compounds of elements in groups 1, 2, 6 and 7.
2.5 Be able to demonstrate an understanding of the use of the endings –ide and –ate in the names of compounds.
2.6 Deduce the formulae of ionic compounds (including oxides, hydroxides, halides, nitrates, carbonates and sulfates) given the formulae of the constituent ions.
2.7 HT only: Be able to describe the structure of ionic compounds as a lattice structure:
- a) consisting of a regular arrangement of ions
- b) held together by strong electrostatic forces (ionic bonds) between oppositely-charged ions
2.8 Be able to describe and (HT only: ) explain the properties of ionic substances including sodium chloride and magnesium oxide, limited to:
- a) melting points and boiling points
- b) whether they conduct electricity as solids, when molten and in aqueous solution
2.9 Know the general rules which describe the solubility of common types of substances in water:
- a) all common sodium, potassium and ammonium salts are soluble
- b) all nitrates are soluble
- c) common chlorides are soluble except those of silver and lead
- d) common sulfates are soluble except those of lead, barium and calcium
- e) common carbonates and hydroxides are insoluble except those of sodium, potassium and ammonium
2.10 Be able to demonstrate an understanding that insoluble salts can be formed as precipitates by the reaction of suitable reagents in solution.
2.11 Be able to demonstrate an understanding of the method needed to prepare a pure, dry sample of an insoluble salt.
2.12 Revise the preparation of an insoluble salt by precipitation.
2.13 Be able to use solubility rules to predict whether a precipitate is formed when named solutions are mixed together and to name the precipitate
2.14 Know that the insoluble salt, barium sulfate, is given as a ‘barium meal’ to X-ray patients because:
- a) it is opaque to X-rays
- b) it is safe to use as, although barium salts are toxic, its insolubility prevents it entering the blood
2.15 Be able to describe tests to show the following ions are present in solids or solutions:
- a) Na⁺, K⁺, Ca²⁺, Cu²⁺ using flame tests
- b) CO₃^2- using dilute acid and identifying the carbon dioxide evolved
- c) SO₄^2- using dilute hydrochloric acid and barium chloride solution
- d) Cl^- using dilute nitric acid and silver nitrate solution
2.16 Know that chemists use spectroscopy (a type of flame test) to detect the presence of very small amounts of elements and that this led to the discovery of new elements, including rubidium and caesium.
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.

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

Chemistry Unit C2 Topic 1 Atomic structure and the periodic table

Chemistry Unit C2 Topic 2 Ionic compounds and analysis

Chemistry Unit C2 Topic 3 Covalent compounds and separation techniques

Chemistry Unit C2 Topic 4 Groups in the periodic table

Chemistry Unit C2 Topic 5 Chemical reactions

Chemistry Unit C2 Topic 6 Quantitative chemistry

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

Website content copyright © Dr Phil Brown 2000-2013 All rights reserved on revision notes, puzzles, quizzes, worksheets, x-words, images etc. Copying of website material is not permitted







		Custom Search