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How to Work Out Oxidation Numbers
A clear SPM method for assigning oxidation numbers, with the rules in order, worked examples on ions and compounds, and how to spot redox from the changes.
2026-09-04Study GuidesHow to Work Out the Formula of an Ionic Compound
A reliable step-by-step method for writing the formula of any ionic compound in SPM Chemistry, with the criss-cross rule, polyatomic ions and worked examples.
2026-09-04Study GuidesHow to Write Chemical Formulae From Ions
An SPM method for writing the formula of an ionic compound from its ions, using charge balancing and the cross-over trick, with brackets and worked examples.
2026-09-04Study GuidesHow to Write Half-Equations for Electrolysis
A clear method for writing cathode and anode half-equations in SPM Chemistry electrolysis, balance the atoms, add the electrons, and check the charges every time.
2026-09-04Study GuidesHow to Write Ionic Equations for SPM
A clear step-by-step method for writing ionic equations in SPM Chemistry: strip out spectator ions, keep state symbols, and check the charge balances every time.
2026-09-04Exam TipsHow to Write State Symbols Correctly
State symbols are easy marks students keep dropping. Learn the (s), (l), (g), (aq) rules and the solubility guide that gets them right every time.
2026-09-04Study GuidesHow to Write the Electron Configuration of an Atom
A step-by-step SPM method for writing the electron arrangement of the first 20 elements, plus how to do ions and read off the group and period.
2026-09-04Study GuidesHow to Write Word and Chemical Equations
Turn a reaction into a word equation, then into a balanced chemical equation with state symbols, including how to predict and name the products for SPM.
2026-09-04Local GuidesHow Town Students Can Get City-Level Chemistry Teaching
Town students often envy city classmates' Chemistry teaching. What city-level teaching really means, and concrete ways to reach it from anywhere.
2026-09-04ComparisonsIs a Chemistry Tutor Worth It for a B Student?
A B in SPM Chemistry is a good grade, so is a tutor worth it to reach an A? An honest look at the B-to-A plateau, what causes it, and when tuition pays off.
2026-09-04ComparisonsIs Chemistry or Physics Harder for SPM?
An honest comparison of what makes SPM Chemistry and SPM Physics difficult, and how to judge which one is harder for your own strengths.
2026-09-04After SPMIs SPM Chemistry Worth Taking?
A balanced look at whether SPM Chemistry is worth keeping in your subject combination, who benefits most, the real opportunity cost, and how to decide honestly.
2026-09-04Ready for one-to-one help?
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