acid + insoluble base method

what would u react together

- an acid that contains an ion you need

- an insoluble base that contains the other

what is the insoluble base often

a metal oxide or a metal hydroxide

what can u sometimes use instead of an insoluble base

the metal itself

what should u begin by doing

heating the acid in a water bath

where should u do the heating of the acid and why

in a fume cupboard to avoid releasing acid fumes into the room

what is the effect of heating the acid in a water bath

it speeds up the reaction between the acid + the insoluble base

what should u add to the acid after you have heated it

the base

what will the base and acid react to produe

a soluble salt and water

how will you know that the base is in excess + that all the acid has been neutralised

bc the excess solid will just sink to the bottom of the flask

why is it important that the base is in excess

so that you don't have any leftover acid in your product

what should you do after all the acid has been reacted

filter off the excess solid so the solution contains only the salt and the water

what do u do once you obtain the salt + water

heat the solution gently using a Bunsen burner to slowly evaporate off some of the water

what should u do once you have evaporated off some of the water

- leave the solution to cool

- and allow the salt to crystallise

what do u do once the salt has crystallised

filter off the solid salt + leave to dry

what would u react together to make hydrated copper sulfate crystals

copper(II) oxide + warm sulfuric acid

OUTLINE METHOD

• heat acid

• add base to acid in excess

• filter off excess solid + obtain solution

• heat solution

• leave it to cool

• filter off solid salt

• leave to dry