Salts

Question 1

State the solubility of Group I and NH4(+) compounds.

Answer 1

All soluble

Question 2

State the solubility of nitrate compounds.

Answer 2

All soluble

Question 3

State the solubility of chloride compounds.

Answer 3

All soluble except silver chloride and lead (II) chloride

Question 4

State the solubility of sulfate compounds

Answer 4

All soluble except calcium sulfate, lead (II) chloride and barium sulfate

Question 5

State the solubility of carbonates, oxides and hydroxides.

Answer 5

All Insoluble

Question 6

State the steps to obtain a soluble group 1 salt, sodium chloride.

Answer 6

1. Pipette a fixed volume (25.0 cm3) of aqueous sodium hydroxide, NaOH in a
   conical flask.
2. Add a few drops of methyl orange into aqueous sodium hydroxide. The methyl
   orange becomes yellow in alkaline solution.
3. Fill up a burette with dilute hydrochloric acid, HCl. Note the initial burette reading.
4. Add hydrochloric acid from the burette slowly into the conical flask until the methyl orange indicator turns from yellow to orange. Record the final burette reading.
5. Repeat the titration using the same volume of acid and alkali but without any indicator, to prepare pure sodium chloride solution.

Question 7

What method to prepare to make insoluble salts such as lead (II) chloride

Answer 7

Precipitation

Question 8

What method to prepare a soluble salt such as magnesium sulfate?

Answer 8

Acid reaction with excess reactant