P1 salt from insoluable base

• What is the general word equation for making a salt using an acid and an insoluble base?

  Acid + Base → Salt + Water
• What are the steps in the required practical to make a soluble salt (e.g. copper(II) sulfate)?

  • warm dilute acid in a beaker (do not boil)
  • add an excess of the insoluable base and stir
  • continue adding until no more dissolves(acid is fully reacted)
  • filter the mixture to remove excess base
  • evaporate some water using a water bath or bunsen burner
  • leave to crystallise (cool and allow crystals to form)
  • dry the crystals
• Why is the base added in excess during the practical?

  To make sure all the acid reacts and no acid remains.
• Why do you filter the mixture before evaporating?

  To remove the unreacted insoluble base
• why is the acid warmed?

  to speed up the reaction
• in a given experiment copper sulphate crystals are hydrated what does this mean?

  the crystals have water molecules present and it allows them to have a blue colour