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Concentration · Higher
Molar concentration: c = n/V; cm³ ÷ 1,000 → dm³; n = cV
Mass concentration: g/dm³ = mol/dm³ × Mᵣ; divide by Mᵣ to reverse
Titration calculation: cV known → balanced ratio → unknown moles ÷ unknown V
Gas link: At stated RTP use V = n × 24 dm³/mol; match units
Titration
Setup: Pipette / filler measures alkali; known acid in burette; indicator
Rinsing: Burette / pipette: their solution; flask: distilled water
Read / prepare: Remove funnel / tip bubbles; meniscus eye level; titre = final − initial
Endpoint: White tile / swirl; dropwise near lasting indicator change
Repeat: Rough trial then concordant accurate titres; mean excludes rough
Safety: Eye protection / filler; handle solutions and spills as instructed
Yield / economy
Yield: Actual collected ÷ theoretical predicted mass × 100
