RP4

Question 1

State what is observed when dilute and excess aqueous sodium hydroxide is added to magnesium chloride

Answer 1

Dilute - slight white precipitate
Excess - white precipitate

Question 2

State what is observed when dilute and excess aqueous sodium hydroxide is added to barium chloride

Answer 2

Dilute - colourless solution
Excess - colourless solution

Question 3

State what is observed when dilute and excess aqueous sodium hydroxide is added to calcium bromide

Answer 3

Dilute - slight white precipitate
Excess - slight white precipitate

Question 4

State what is observed when dilute and excess aqueous sodium hydroxide is added to strontium chloride

Answer 4

Dilute - slight white precipitate
Excess - slight white precipitate

Question 5

State what is observed when dilute and excess aqueous sulfuric acid is added to barium chloride

Answer 5

Dilute - white precipitate
Excess - white precipitate

Question 6

State what is observed when dilute and excess aqueous sulfuric acid is added to calcium bromide

Answer 6

Dilute - slight white precipitate
Excess - slight white precipitate

Question 7

State what is observed when dilute and excess aqueous sulfuric acid is added to strontium chloride

Answer 7

Dilute - white precipitate
Excess - white precipitate

Question 7

State what is observed when dilute and excess aqueous sulfuric acid is added to magnesium chloride

Answer 7

Dilute - slight white precipitate
Excess - colourless solution

Question 8

Write the equation for Cl- reducing concentrated sulfuric acid.

Answer 8

NaCl(s) + H2SO4(l) -> NaHSO4(s) + HCl(g)
- HCl produces white misty fumes