soluble and insoluble salts

Question 1

all nitrates?

Answer 1

soluble

Question 2

how to make insoluble salts?

Answer 2

precipitation method

Question 3

how to make soluble salts?

Answer 3

titration or filtration

Question 4

when do you use a titration?

Answer 4

when both reactants are soluble

Question 5

when do you use filtration?

Answer 5

when one reactant is insoluble

Question 6

how to make soluble salts

Answer 6

neutralising acids and crystallising the remaining solution

Question 7

formula for making soluble salts

Answer 7

Acid (aq) + Base (s)/Alkali(aq) —–> Salt(aq) + Water (l)

Question 8

How to make insoluble salts

Answer 8

mix solutions to make a precipitate

Question 9

How to make soluble salts

Answer 9

insoluble base method

Question 10

What is insoluble base method

Answer 10

• heat acid
• add more base so we know all acid used up, and base in excess
• filter out excess base

Question 11

how to crystallise

Answer 11

• heat salt solution till crystals start forming
• allow to cool in evaporating basin for few days
• filter out crystals to remove excess salt
• dry crystals by dabbing

Question 12

group 1 or NH4+?

Answer 12

soluble

Question 13

most sulphates?

Answer 13

soluble

Question 14

insoluble sulphates?

Answer 14

lead, barium, calcium

Question 15

most chlorides?

Answer 15

soluble

Question 16

insoluble chlorides?

Answer 16

lead, silver

Question 17

most carbonates?

Answer 17

insoluble

Question 18

soluble carbonates?

Answer 18

ammonium, potassium, sodium

Question 19

most hydroxides?

Answer 19

insoluble

Question 20

soluble hydroxides?

Answer 20

ammonium, potassium, sodium