English National Curriculum - Science
Mission Objectives
Describe the test used to identify carbonates
Describe the test used to identify halides
Describe the test used to identify sulphates
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Words and meanings to learn
carbonates
negative ions with the formula CO₃²⁻; they react with acids to produce carbon dioxide gas
anion
a negatively charged ion (an atom or group of atoms that has gained electrons)
precipitate
a solid that forms when two solutions react together; it appears as a cloudy or powdery solid in the liquid
halides
negative ions formed from Group 7 elements (the halogens), such as chloride (Cl⁻), bromide (Br⁻) and iodide (I⁻)
sulphates
negative ions with the formula SO₄²⁻
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Copper carbonate, potassium chloride, magnesium sulphate, sodium chloride, potassium iodide, barium chloride, calcium chloride, copper sulphate.
Carbonates:
Sulphates:
Halides:
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