Oxides And Acid/Bases

Question 1

What are the 4 metals that form amphoteric oxides?

Answer 1

Zn
Pb
Al
*Gallium

Question 2

What kind of oxides do metals form?

Answer 2

Metallic Oxides are BASIC oxides.

Question 3

What kind of oxides do non-metals form?

Answer 3

Non-metallic oxides, ACIDIC oxides

Question 4

What are the reactive properties of basic oxides?

Answer 4

Basic oxides react with ACIDS to form salt and water

but does not react with alkalis

Question 5

What are monoxides?

Answer 5

Neutral oxides that do not react with anything (inert)

Question 6

What are the reaction properties of amphoteric oxides?

Answer 6

Reacts with both acids and alkali to form a salt and water.

Question 7

Define a strong acid.

Answer 7

A substance that FULLY ionises in water to give a HIGH concentration of H+ ions

Question 8

Define a weak acid.

Answer 8

A substance that PARTIALLY ionises to give a LOW concentration of H+ ions.

Question 9

What are the physical properties of acids?

Answer 9

• Tastes sour
• pH less than 7
• turns damp blue litmus red, turns green universal indicator red.
• Conducts electricity

Question 10

What are the 3 rxns of acids?

Answer 10

1. Acid + Base —-> Salt + Water
2. Acid + Reactive Metal ——> Salt + Hydrogen gas.
3. Acid + Metal Carbonate —–> Salt + CO2+ H20

Question 11

What is the definition of a base?

Answer 11

Bases are oxides and hydroxides of metals.

Question 12

How soluble are bases?

Answer 12

All bases are insoluble in water except grp 1 metal and calcium oxides/hydroxide

Question 13

What are the physical properties of alkalis?

Answer 13

Ph > 7
Turns damp red litmus paper blue, and turns green UI blue/purple
conducts electricity

Question 14

What are alkali reactions?

Answer 14

1. Alkali + Acid —-> Salt + Water
2. Alkali + Ammonium salt —-> Salt + Ammonia gas + water
3. Alkali + Metal salt —-> Insoluble metal hydroxide + soluble salt