Coaching Centre
Chapter 3: Chemical Reactions Notes
Writing and balancing chemical equations, conservation of mass, acids, bases and pH, reactions of acids and titration, combustion and corrosion, precipitation, displacement and decomposition, and chemistry in the body, industry and the oceans.
Sections
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3A Writing and balancing equations Mastered
Reading chemical formulas, naming ionic and molecular compounds, state symbols, balancing equations step by step, and using the law of conservation of mass to predict the masses of reactants and products.
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3B Acids, bases and pH Mastered
What acids and bases are, indicators including red cabbage, the logarithmic pH scale, and the difference between strong and weak acids and between concentrated and dilute solutions, with ash as a base in First Nations chemistry.
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3C Reactions of acids Mastered
Neutralisation and naming salts, acids reacting with metals and with carbonates, testing for hydrogen and carbon dioxide, and titration to find exactly how much base neutralises an acid, with pH curves and indicator choice.
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3D Combustion and corrosion Mastered
Reactions with oxygen: metal and non-metal oxides and acid rain, combustion of hydrocarbons as an oxidation reaction, charcoal, how iron rusts in a water drop, and how paint, tin, zinc, magnesium and stainless steel protect steel from corrosion.
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3E Precipitation reactions Mastered
How ionic compounds dissolve into ions, how mixing two solutions can form an insoluble precipitate, ionic equations and spectator ions, simple solubility rules, and using precipitates to test for ions and clean water.
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3F Displacement and decomposition Mastered
The activity series of metals, metal displacement reactions and electron transfer, how reactivity decides how metals are extracted from ores, thermal, electrical and light-driven decomposition, and a summary of reaction types.
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3G Chemistry in our world Mastered
Chemical reactions in the body (stomach acid, antacids, respiration and fermentation), how iron is made in a blast furnace and how hydrogen could make "green steel", and how rising carbon dioxide is acidifying the oceans.
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3H Chemical reactions review Mastered
A summary of the whole Chemical Reactions chapter, key words, and a mixed test covering balancing equations, acids and bases, combustion and corrosion, precipitation, displacement and decomposition, and chemistry in the body, industry and the environment.