Titration: IGCSE EDEXCEL CHEMISTRY

What type of experiment would be carried out to determine how much acid is needed to neutralise an alkali (base) or vice versa how much alkali is needed to neutralise an acid?

• Addition

• Substitution

• Titration

• Precipitate

A student carries out a titration experiment to determine the concentration of sulfuric acid needed to neutralise sodium hydroxide

Name the piece of apparatus that the student should use to add the sodium hydroxide

solution

During a titration where an acid is used to neutralise an alkali , what is the colour change of the phenolphthalein indicator at the end of the experiment?

• Colourless to pink

• Pink to colourless

• Orange to pink

• Pink to orange

Why is it better to use phenolphthalein indicator rather than universal indicator in

a titration?

• Because universal indicator has a wide range of colours rather than one specific colour change so it would be unclear when the precise endpoint of titration was achieved.

• Phenolphthalein is cheaper and more readily available than universal indicator

• It is easier and more efficient to add a few drops of phenolphthalein than to use a a universal indicator

What type of indicator would be suited to use for a titration?

• Phenolphthalein

• Methyl Orange

• Universal indicator

In a titration experiment, what piece of equipment should be used to put the acid in?

• Pipette

• Burette

• Measuring cylinder

• Conical flask

Why should a burette be used for the acid in a titration and not a pipette

• It can hold more than a pipette

• Higher degree of accuracy as the burette is continuously graduated

• Different volumes can be measured

• Addition of acid can be controlled

• Pipette only has one graduation mark

Why is it not recommended to use a universal indicator in a titration experiment?

Due to the fact that the colour change is g____ and not a sh____ colour change

What should you place under the conical flask when carrying out a titration experiment?

Pipettes only measure one volume where as burette can measure different volumes

• True

• False