Chemistry study guides
SG-N-LEVEL · GCE N-Level (Singapore) · aligned to SEAB.
- Acids, Bases and Salts (Singapore N(A)-Level Science Chemistry 5107): acids as sources of hydrogen ions, the pH scale and indicators, the three reactions of acids, and choosing the right method to prepare a pure salt
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Acids, Bases and Salts. Acids as sources of hydrogen ions and bases that accept them, the pH scale and indicators, the three characteristic reactions of acids, and how to choose between the acid-plus-excess-solid method and precipitation to prepare a pure salt, with links to every dot point.
📖 8 min readSEAB-5107 - Atomic Structure and Bonding (Singapore N(A)-Level Science Chemistry 5107): the structure of the atom, electron shells, and how ionic and covalent bonding explain the properties of compounds
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Atomic Structure and Bonding. The protons, neutrons and electrons inside an atom, proton and nucleon number, electron shell arrangements, and how transferring electrons gives ionic bonding while sharing electrons gives covalent bonding, with each bonding type linked to the properties of its compounds.
📖 6 min readSEAB-5107 - Electrolysis (Singapore N(A)-Level Science Chemistry 5107): breaking down molten and aqueous compounds with electricity, predicting the products at each electrode, and the everyday uses of electrolysis
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Electrolysis. How molten ionic compounds and aqueous solutions are broken down by electricity, why the compound must be molten or dissolved, how to predict the product at each electrode, and the everyday uses including electroplating, with links to every dot point.
📖 5 min readSEAB-5107 - Energetics, Rates and Redox (Singapore N(A)-Level Science Chemistry 5107): exothermic and endothermic reactions, the factors that change the speed of a reaction, and oxidation and reduction in terms of oxygen and electrons
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Energetics, Rates and Redox. Exothermic and endothermic reactions and their energy level diagrams, how concentration, temperature, surface area and catalysts change reaction speed through colliding particles, and oxidation and reduction defined by oxygen and by electron transfer, with links to every dot point.
📖 5 min readSEAB-5107 - Experimental Chemistry and Separation (Singapore N(A)-Level Science Chemistry 5107): choosing and reading laboratory apparatus, separating mixtures by physical methods, and testing for purity and identifying common gases
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Experimental Chemistry and Separation. Choosing and correctly reading apparatus for volume, mass, temperature and time, the separation methods from filtration to fractional distillation and chromatography, and using melting and boiling points and gas tests to judge purity and identify substances, with links to every dot point.
📖 5 min readSEAB-5107 - Metals and Reactivity (Singapore N(A)-Level Science Chemistry 5107): the properties of metals and alloys, the reactivity series and displacement, and how reactivity decides the way a metal is extracted and how it corrodes
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Metals and Reactivity. The general physical properties of metals, why alloys are often harder and more useful than pure metals, the reactivity series and how it predicts displacement, and how a metal's reactivity decides its extraction method and its tendency to corrode, with links to every dot point.
📖 5 min readSEAB-5107 - Organic Chemistry (Singapore N(A)-Level Science Chemistry 5107): the alkanes as fuels, the alkenes and the bromine water test, and ethanol as an alcohol with its uses
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Organic Chemistry. The alkanes as saturated hydrocarbon fuels and their complete and incomplete combustion, the alkenes as unsaturated hydrocarbons distinguished by the bromine water test, and ethanol as a member of the alcohols made by fermentation, with links to every dot point.
📖 5 min readSEAB-5107 - Particulate Nature of Matter (Singapore N(A)-Level Science Chemistry 5107): the particle model of solids, liquids and gases, the changes of state and diffusion, and the difference between elements, compounds and mixtures
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of the Particulate Nature of Matter. The arrangement, movement and energy of particles in solids, liquids and gases, the changes of state and why temperature stays constant during them, diffusion explained by moving particles, and the difference between elements, compounds and mixtures, with links to every dot point.
📖 5 min readSEAB-5107 - Stoichiometry and the Mole (Singapore N(A)-Level Science Chemistry 5107): writing formulae and balancing equations, the mole and relative masses, and using mole ratios to work out reacting masses
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of Stoichiometry and the Mole. Writing formulae from ion charges and balancing symbol equations, the meaning of the mole and relative masses, and using the mole ratio from a balanced equation to calculate reacting masses, concentration and percentage yield, with links to every dot point.
📖 7 min readSEAB-5107 - The Periodic Table (Singapore N(A)-Level Science Chemistry 5107): how the table is arranged into groups and periods, the trends down Group I, Group VII and Group 0, and the difference between metals, non-metals and the transition block
A Singapore N(A)-Level Science Chemistry (SEAB 5107) overview of the Periodic Table. How the table is arranged into groups and periods and how position links to electron arrangement, the trends down the Group I metals, the Group VII non-metals and the Group 0 noble gases, and how metals, non-metals and the transition block differ, with links to every dot point.
📖 5 min readSEAB-5107