Titrations (Edexcel GCSE Chemistry Combined Science): Flashcards

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Titrations
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Purpose of titration

Determine concentration of acid or base

Concentration formula

molesvolume (dm3)\frac{\text{moles}}{\text{volume (dm}^3\text{)}}

Analyte definition

Substance whose concentration is being determined

Titrant definition

Solution of known concentration

Purpose of indicator

Changes colour when neutralisation complete

Titre definition

Volume of titrant used

When to stop adding titrant

When indicator permanently changes colour

Number of titration repeats needed

At least three times

Concordant titres definition

Results within 0.20 cm³ of each other

Burette measurement precision

0.05 cm³

Burette scale starting point

0 cm³ at the top

Where to read burette meniscus

Bottom of the meniscus

Effect of unfilled jet space

Titre reading larger than actual

Flask action during titration

Swirl continuously

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