chapt 8

Question 1

what are acids (1) and properties of acid (6)

Answer 1

substance that produce hydrogen ions in aq solutions

-> sour taste
-> acidic oxides dissolve in water, bcm acids which conducts elect.
-> turn blue litmus red
-> metal + acid = salt and h2
-> base (metal oxide/ hydroxide) + acid = salt and water (neutralisation)
-> metal carbonate + acid = salt water and co2

Question 2

what is a base (1) and properties (6)

Answer 2

any metal oxide/ hydroxide as they contain oxide/ hydroxide ion

-> bitter taste
-> slippery and soapy
-> basic oxides dissolve in water, bcm alkali which conducts elect.
-> turn red litmus blue
- Alkali (soluble in water which produce hydroxide ions)
- heat with ammonium salts = ammonia gas

Question 3

non metal oxides? (2)

Answer 3

Acidic oxides : react with alkalis to form salt and water

Neutral oxides : Neither acidic or basic

Question 4

metallic oxides? (2)

Answer 4

Amphoteric oxides : react with both acids and alkali

Basic oxides : reacts with acids to form salt and water