Acids and Bases

Question 1

pH of acids

Answer 1

Less than 7

Question 2

pH of alkali

Answer 2

More than 7

Question 3

An acid is a source of…

Answer 3

hydrOGEN ions (H+)

Question 4

A base is…

Answer 4

a substance which can neutralise an acid. Alkalis are soluble bases.

Question 5

An alkali is a source of…

Answer 5

hydrOXIDE ions (OH-)

Question 6

Neutralisation reaction

Answer 6

The reaction between and acid and a base:
acid + base –> salt + water

or, H+(aq) + OH-(aq) –> H2O
The products are neutral.

Question 7

What is the name of the reaction between and acid and a base?

Answer 7

Neutralisation.

Question 8

Reaction between acids and metal oxides or metal hydroxides

Answer 8

Metal oxides/hydroxides are usually bases so they react the same way.
acid + metal oxide/hydroxide –> salt + water

The salt produced is determined by the acid used:
sulfuric acid + copper oxide –> copper sulfate + water

Question 9

Reaction between acids and metal carbonates

Answer 9

acids + metal carbonate –> salt + water + carbon dioxide

The salt you get depends on the acid you used:
hydrochloric acid + sodium carbonate –> sodium chloride + water + carbon dioxide

Question 10

Hydrochloric acid

Answer 10

HCl

Question 11

Sulfuric acid

Answer 11

H2SO4

Question 12

Nitric acid

Answer 12

HNO3

Question 13

Reaction between acids and metals

Answer 13

acid + metal –> salt + hydrogen