Titration - PRACTICAL Flashcards
Chemical Changes (13 cards)
What is the purpose of titrations?
To find out concentrations of acids and alkalis
Titrations allow for the determination of how much acid is needed to neutralize a given quantity of alkali or vice versa.
What equipment is commonly used to measure a set volume of alkali in a titration?
Pipette
A pipette is used to accurately measure a single volume of solution.
What is the role of a burette in a titration?
To measure and deliver acid of known concentration drop by drop
Burettes allow for precise measurement of the volume of acid used in the titration process.
What is the correct way to fill a burette?
Fill using a funnel and ensure to do it below eye level
This prevents spills and ensures safety during the titration.
What should you wear for safety during a titration?
Safety glasses
Wearing safety glasses protects the eyes from spills and splashes of corrosive substances.
What is the endpoint in a titration?
The point at which the indicator changes color
This indicates that all the alkali has been neutralized.
What color change does phenolphthalein undergo in acidic conditions?
Colorless
Phenolphthalein is pink in alkaline conditions and colorless in acidic conditions.
What should you do after the first titration?
Repeat the titration several times
This helps to obtain consistent results and identify any anomalous results.
What is an anomalous result?
A result that does not fit in with the rest
Anomalous results should be ignored when calculating the mean.
How much variance is acceptable when repeating titrations?
Within 0.10 cm³
This ensures that the results are consistent and reliable.
What should you calculate after conducting multiple titrations?
The mean of your results
This provides a more accurate representation of the concentration being measured.
Fill in the blank: The initial volume of acid in the burette should be recorded as the _______.
Initial reading
This measurement is essential for calculating how much acid was used.
What is the significance of swirling the conical flask during titration?
To ensure thorough mixing of the acid and alkali
Proper mixing helps achieve uniform reaction and accurate endpoint detection.
