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Calculation 2 - Edexcel IGCSE Chemistry
Complete lessons and workbook
Content
Understand how the formulae of simple compounds can be btained experimentally, including metal oxides, water and alts containing water of crystallisation
Know what is meant by the terms empirical and molecular ormula
Calculate empirical and molecular formulae from xperimental data
Calculate reacting masses using experimental data and hemical equations
Calculate percentage yield
Describe the formation of carbon dioxide from the thermal ecomposition of metal carbonates, including copper (II) arbonate
Understand how to carry out calculations involving gas olumes and the molar volume of a gas (24 dm3 and 24,000 m3 at room temperature and pressure (rtp))
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Testing for Ions - Edexcel IGCSE Chemistry
Content
Understanding the general rules for predicting the solubility of salts
in water:
all common sodium, potassium and ammonium salts are
soluble
all nitrates are soluble
3.common chlorides are soluble, except silver chloride
common sulfates are soluble, except those of barium and
calcium
5.common carbonates are insoluble, except those of sodium,
potassium and ammonium
Describing simple tests for the cations (positive ions): Cu2+, Fe2+ , Fe3+ and NH4+ using sodium hydroxide solution
Describe simple tests for the anions (negative ions): Cl-, Br- and I-, using dilute nitric acid and silver nitrate solution
SO42-, using dilute hydrochloric acid and barium chloride
solution
CO32-, using dilute hydrochloric acid and identifying the carbon
dioxide evolved
Writing word and symbol (full and ionic) equations for these tests