Titration Flashcards
In an acid-base titration how is the concentration of the acid or base determined?
In an acid-base titration, the concentration of the acid or base is determined by accurately measuring the volumes used in the neutralisation reaction.
Why is an indicator added in a titration experiment?
An indicator is added to show the end-point of the reaction.
How do we know when the reaction between an acid or an alkali is complete?
The indicator changes colour at the point where the reaction between the acid and alkali is complete-the end point.
What is a pipette used for?
A pipette is used to measure the exact volume of alkali.
What is a burette used for?
A burette is used to measure the exact volume of acid required to neutralise the alkali.
What is a titre?
The exact volume is often known as a titre.
What is the use of a trial titration?
A trial titration is carried out quickly to produce a rough titre, but this result is not used in the final calculation.
What titre is used in the final calculation?
The titre used in the final calculation is the average of each titration, excluding the trial. Only results within +- 0.2 cm3 are used to calculate the average titre. These are concordant results.
What is a standard solution?
A standard solution is a solution of accurately known concentration.
In titration calculations when would the pupil know to stop adding acid from the burette?
The pupil would know when to stop adding acid from the burette because there would be a colour change.
