prepare a soluble salt

• how can a soluble salt be made?

  from a reaction of an acid with an insoluble base
• how is the insoluble reactant added in the preparation of soluble salts + why?

  in excess - to ensure that all of the acid has reacted
• how is the excess reactant removed + why?

  by filtration - to ensure that only the salt + water remain
• what is left after filtration?

  salt + water
• how is the water evaporated after filtration + when should it be stopped?

  by heating until small crystals begin to appear
• how is the water evaporated + how long of a period would allow the best results?

  • by heating
  • allowing the filtered solution to evaporate slowly over a period of days results in the formation of large crystals