Titrations

Question 1

What are titrations used to find out?

Answer 1

Concentration. Titrations allow you to find out exactly what volume of acid is needed to neutralise a measured volume of alkali.

Question 2

What are titrations?

Answer 2

A titration is an experimental technique used to find an unknown concentration of an acid or an alkali.

Question 3

What equipment is needed for titrations?

Answer 3

A pipette to accurately measure a certain volume of acid or alkali (normally 25 cm3)
A conical flask to contain the liquid from the pipette
A burette to add alkali or acid to the the conical flask
A white tile to place the conical flask on

Question 4

What colour is phenolphthalein in acidic solutions?

Answer 4

Colourless

Question 5

What is a universal indicator used for?

Answer 5

Universal indicator is used to estimate the pH of a solution because it can turn a variety of colours. Each colour indicates a narrow range of pH values

Question 6

Name 3 single indicators.

Answer 6

Phenolphthalein, litmus, methyl orange

Question 7

What colour is phenolphthalein in acids or alkalis?

Answer 7

Colourless in acids
Pink in alkalis

Question 8

What colour is litmus in acids or alkalis?

Answer 8

Red in acids
Blue in alkalis

Question 9

What colour is methyl orange in acids or alkalis?

Answer 9

Red in acids
Yellow in alkalis

Question 10

Why should you repeat titrations?

Answer 10

To find a mean volume