Study Guides
Online one-to-one SPM Chemistry, taught by an experienced teacher.
How to Calculate Relative Molecular Mass
Add up the relative atomic masses to find relative molecular mass in SPM Chemistry, with a clean method for brackets, hydrated salts and ionic compounds.
2026-09-04Study GuidesFind the Concentration of an Acid by Titration
Learn how to calculate the concentration of an unknown acid by titrating it against a standard alkali, with the mole-ratio method and two fully worked SPM examples.
2026-09-04Study GuidesEmpirical Formula from Percentage Composition
A step-by-step SPM Chemistry method to find the empirical formula from percentage composition by mass, with worked examples and the molecular-formula step.
2026-09-04Study GuidesHow to Calculate the Rate of Reaction From a Graph
A step-by-step SPM guide to reading rate off a graph: average rate, instantaneous rate from a tangent, why the curve flattens, and the units, with two worked examples.
2026-09-04Study GuidesHow to Classify Organic Compounds by Homologous Series
A clear SPM method for sorting carbon compounds into homologous series using functional group and general formula, with the five series, their formulae and worked identifications.
2026-09-04Study GuidesHow to Construct an Electrochemical Cell Diagram
Draw a voltaic cell for SPM that earns full marks: label the electrodes, terminals, electron flow and half equations, with the Daniell cell worked through.
2026-09-04Study GuidesConvert Between Moles, Mass and Particles
Use the mole as the central hub to convert mass to moles to particles in SPM Chemistry, with the two formulae, a clear map and fully worked examples.
2026-09-04Study GuidesHow to Distinguish Alkanes From Alkenes
The SPM tests that separate alkanes from alkenes: bromine water, potassium manganate(VII), flame sootiness, plus the structure and general formulae behind them.
2026-09-04Study GuidesHow to Do a Salt Preparation by Titration
The full SPM method for preparing a soluble sodium, potassium or ammonium salt by acid–alkali titration, with apparatus, the two-stage technique and why it works.
2026-09-04Study GuidesHow to Do Gas Volume Calculations at r.t.p.
Use the molar volume of a gas to convert between moles, mass and volume at r.t.p., with worked SPM examples and the cm3-to-dm3 traps to avoid.
2026-09-04Study GuidesHow to Do Mole-to-Mass Calculations
The reacting-mass method for SPM Chemistry: turn a given mass into moles, cross the balanced equation with the mole ratio, and convert back to the mass you need.
2026-09-04Study GuidesHow to Do Titration Calculations for SPM
A step-by-step SPM method for titration calculations, from average titre to concentration, with the mole-ratio rule and fully worked 1:1 and 1:2 examples.
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