Titrations (OCR GCSE Chemistry A (Gateway Science Suite)): Flashcards
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Definition of titrations
Definition of titrations
Technique to determine concentration by reacting with a solution of known concentration
Purpose of titrations in acid-base chemistry
Purpose of titrations in acid-base chemistry
Determine amount of base needed to neutralise acid or vice versa
What is the analyte in titration
What is the analyte in titration
Substance whose concentration you want to determine
Purpose of indicator in titration
Purpose of indicator in titration
Changes colour when analyte is completely neutralised
What is a burette
What is a burette
Instrument used to deliver titrant into analyte
How to prepare burette before titration
How to prepare burette before titration
Rinse with titrant, then fill ensuring jet space is filled
Why fill jet space of burette
Why fill jet space of burette
Prevents inaccurate volume readings
Initial burette reading position
Initial burette reading position
Bottom of meniscus at cm³ mark
Why swirl flask during titration
Why swirl flask during titration
To mix solutions thoroughly
What signals titration endpoint
What signals titration endpoint
Indicator permanently changes colour
Definition of titre
Definition of titre
Volume of titrant used from initial to final reading
What are concordant titres
What are concordant titres
Results within cm³ of each other
Minimum number of titration repetitions
Minimum number of titration repetitions
At least three times
Burette reading precision
Burette reading precision
To nearest cm³
Where does burette scale start
Where does burette scale start
cm³ at the top