Chemistry C3 4.3 Titrations.

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What is a titration used for?
To measure accurately how much acid and alkali react together completely.
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What is the point at which an acid-base reaction is complete called?
The end point of the reaction.
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What is used to show the end point of the reaction between an acid and an alkali?
An indicator.
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What occurs when solutions of an acid and an alkali react to form a slat and water?
A neutralisation reaction takes place, the volumes of solutions that react exactly can be found by using a titration.
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How is a titration done?
A pipette is used to measure accurately the volume of alkali that is put into a conical flask. An indicator is added to the alkali. A burette is filled with acid, which is then added gradually to the flask.
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What is the difference between a pipette and a burette?
A pipette measures a fixed volume, has a single graduation, and has no tap whereas a burette measures different volumes, has graduations and a tap.
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What does it mean when the indicator changes colour?
The end point has been reached.
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How is the volume of acid used found?
From the initial and final burette readings.
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Why should the titration be done several times?
To improve the repeatability of the results.
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Why is an indicator needed in acid-alkali titrations?
To show when the end point is reached or when the reaction is complete or when the acid and alkali have reacted exactly.
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**MAKE SURE YOU CAN DESCRIBE HOW TO USE A PIPETTE AND A BURETTE TO DO A TITRATION AND OBTAIN RESULTS THAT ARE PRECISE AND REPEATABLE.
**MAKE SURE YOU CAN DESCRIBE HOW TO USE A PIPETTE AND A BURETTE TO DO A TITRATION AND OBTAIN RESULTS THAT ARE PRECISE AND REPEATABLE.
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Other cards in this set

Card 2

Front

What is the point at which an acid-base reaction is complete called?

Back

The end point of the reaction.

Card 3

Front

What is used to show the end point of the reaction between an acid and an alkali?

Back

Preview of the front of card 3

Card 4

Front

What occurs when solutions of an acid and an alkali react to form a slat and water?

Back

Preview of the front of card 4

Card 5

Front

How is a titration done?

Back

Preview of the front of card 5
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