precipitation UPDATED

what should you do if the question starts off with 2 powders

dissolve both in deionised water separately

and shake thoroughly to ensure all dissolved

why do u use deionised water

to ensure there are no other ions about

what type of solutions do u need to react in a precipitation reaction

2 soluble salt solutions

what 2 soluble salts could you always use

- X nitrate

- sodium Y

what should u do once your 2 solutions are made

combine the two solutions in a small beaker and stir to ensure they are mixed together

what should happen after mixtures combine

a precipitate should form

what do u do once the precipitate forms

filter to obtain it

how do u filter to obtain the precipitate

put a folded piece of filter paper into a filter funnel

stick the funnel into a conical flask

pour the beaker contents into the middle of the filter paper (ensure solution does not go above filter paper)

what do you do to ensure all precipitate is obtained from the beaker

swill out the beaker with more deionised water

and tip this into the filter paper

what do you do once you have obtained the precipitate/ residue

wash thru the residue with deionised water to remove soluble impurities

how do u obtain a dry salt from this

place precipitate in a warm oven at 50C

summary

make 2 soluble solutions

combine them together

obtain the precipitate by filtering

wash the precipitate

leave to dry

how should u use this to make lead(II)sulfate

- add a spatula of lead nitrate to a test tube with deionised water

- do the same with magnesium sulfate