Making Salts Flow Chart

Seite 1

Is the salt soluble?

NO

Precipitation

Make 2 solutions, each one containing one ion of the salt to be made (use soluble salts!!!)

Mix the solutions

Filter off the precipitate which is the insoluble salt

Wash the residue with distilled water

Dry with filter paper or on warm gauze

YES

Is the base soluble?

YES

Titration

Add acid via burette to alkali + indicator until neutral (or until temperature stops rising)

Measure volume of acid added; throw away solution as it contains the indicator

Add same volume of acid to same volume of alkali without indicator

Obtain dry salt from solution

Add excess base

Add excess base to acid until no more will dissolve (warm the solution if necessary)

Filter off excess base

Obtain dry salt from the solution

NO

How to Obtain Dry Salt From a Solution

Concentrate solution until it becomes fully saturated by evaporating as much water as possible. The solution is saturated when crystals form on a glass rod dipped into it.

Allow the solution to cool and salt crystals to form

Filter the crystals to remove water

Wash crystals with a little water

Dry crystals with filter paper or place on a warm gauze.