4.2.5 Titrations

• How can the volumes of acid and alkali solutions that react with each other be measured?

  Titration.
• What kind of indicator is used in titrations?

  Single indicator.
• What colour is the single indicator litmus in alkalis?

  Blue.
• What colour is the single indicator litmus in acids?

  Red.
• What colour is the single indicator phenolphthalein in alkalis?

  Pink.
• What colour is the single indicator phenolphthalein in acids?

  Colourless.
• What colour is the single indicator methyl orange in alkalis?

  Yellow.
• What colour is the single indicator methyl orange in acids?

  Red.
• What are the 3 main single indicators?

  Litmus, phenolphthalein and methyl orange.