Acids, Bases and Salts quiz (Singapore N(A)-Level Science Chemistry, SEAB 5107) quiz

Hydroxide ions

Hydrogen ions

Oxide ions

Carbonate ions

Carbon dioxide

Oxygen

Hydrogen

Chlorine

Salt and hydrogen only

Salt and water only

Salt and oxygen

Salt, water and carbon dioxide

It turns limewater milky

It relights a glowing splint

It pops with a lighted splint

It turns damp red litmus blue

0

7

10

14

Green

Blue

Red

Purple

$\text{H}^+(aq) + \text{OH}^-(aq) \rightarrow \text{H}_2\text{O}(l)$

$\text{H}^+(aq) + \text{O}^{2-}(aq) \rightarrow \text{OH}^-(aq)$

$\text{Na}^+(aq) + \text{Cl}^-(aq) \rightarrow \text{NaCl}(s)$

$\text{H}_2(g) + \text{O}_2(g) \rightarrow \text{H}_2\text{O}(l)$

Adding excess metal oxide to an acid

Heating the salt to crystallisation

Titration of an acid with an alkali

Precipitation by mixing two soluble solutions

To ensure all the acid has reacted

To make the salt insoluble

To speed up crystallisation

To change the colour of the solution

Evaporate the mixture to dryness immediately

Filter to remove the unreacted copper(II) oxide

Add more acid until the solid dissolves

Cool the mixture in ice

Sodium sulfate

Sodium chloride

Sodium nitrate

Sodium carbonate

Hydrochloric acid

Copper(II) oxide

Carbon dioxide

Sodium hydroxide solution

It contains more hydrogen ions

It contains fewer hydrogen ions

It is more dilute

It is more alkaline

The salt would be insoluble

You cannot filter off an excess of a soluble reactant

Titration produces no water

Soluble bases do not react with acids

The solution turns red

The mixture stops getting warm

Some solid remains undissolved

Bubbles appear