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Concentration & Titration Calculations

Chapter summary, hard words and model exam answers for ICSE Class 10 Hindi.

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Chemistry · CBSE 10 · ICSE 10 · GCSE (AQA, Edexcel, OCR)

It is measured in mol/dm³ or g/dm³. Swap between them with: g/dm³ = mol/dm³ × molar mass.

Rearrange to c = n/V or V = n/c. Convert cm³ to dm³ first by dividing by 1000.

Use c₁V₁ = c₂V₂. In the lab always add acid to water, never water to acid (it is exothermic).

The burette volume used is the titre. Use the mole ratio from the balanced equation to find the unknown concentration.

solute	the substance that dissolves in a solvent to form a solution
solution	a uniform mixture of a solute dissolved in a solvent
concentration	amount of solute per unit volume of solution, in mol/dm³ or g/dm³
molar mass	mass of one mole of a substance in grams, from its formula
dilution	lowering concentration by adding more solvent while moles stay fixed
titration	adding one solution to another until reaction is complete, to find an unknown concentration
end-point	the moment in a titration when the indicator changes colour
concordant titres	burette volumes that agree within 0.10 cm³, used to find a reliable mean

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