Making Salts

Question 1

What common salts are soluble?

Answer 1

Sodium
Potassium
Ammonium

Question 2

All ** are soluble

Answer 2

Nitrates

Question 3

Common chlorides are *** except ***

Answer 3

Soluble except silver chloride

Question 4

Common sulfates are ***, except those of ** and ***

Answer 4

Soluble, except for those of barium and calcium

Question 5

Common carbonates are ** except for those of….?

Answer 5

Insoluble except
Sodium
Potassium
Ammonium

Question 6

What method should i use to make a salt that is not soluble?

Answer 6

The precipitation method

Question 7

What method should i use to make a salt that is soluble but not potassium sodium or ammonium?

Answer 7

The excess metal/base method

Question 8

How to make a salt of sodium potassium or ammonium?

Answer 8

Use the titration method

Question 9

What is the precipitation method?

Answer 9

Taking two soluble salts and reacting them to form a precipitate
It is then filtered and washed with pure water
Then its left to dry

Question 10

What is the excess base/metal method?

Answer 10

Reacting acid with a metal or an insoluble base.

1. Solid is weighed and added in small portions to the acid - excess solid is added to ensure all of the acid is neutralised
2. The mixture is heated to speed up the reaction
3. The solution is filtered using a filter funnel and filter paper to remove the excess solid
4. The solution is left to crystalise

Question 11

Examples of an insoluble base?

Answer 11

Metal
Metal oxide
Metal carbonate

Question 12

What is acid alkali titration?

Answer 12

1. A known volume of acid is pipettes into a conical flask ad an indicator is added
2. The alkali is added slowly using a burette until the indicator shows pH 7 (neutral) so that all of the acid is neutralised
3. The volume of the alkali needed for neutralisation is noted
4. The solution is transferred to an evaporating dish and left to crystalise