Acid and bases reactions

Question 1

acid + metal hydroxide

Answer 1

salt + water

Question 2

acid + metal carbonate

Answer 2

salt + water + carbon dioxide

Question 3

acid +metal hydrogencarbonate

Answer 3

salt + water + carbon dioxide

Question 4

acid + reactive metal

Answer 4

salt + hydrogen

Question 5

base + ammonium salt

Answer 5

salt + ammonia gas + water

Question 6

Density of water

Answer 6

Water in its solid state is less dense than in its liquid state. As water is cooled its molecules slow down, lose kinetic energy and hydrogen bonding brings them closer together. As it begins to freeze it forms an open crystalline structure.

Question 7

Surface tension of water

Answer 7

Water has a high surface tension due to the strong forces of attraction between water molecules at the surface.

Question 8

Melting and boiling point of water

Answer 8

High melting and boiling points due to strong hydrogen bonding that must be overcome in order for it to change state from solid to liquid to gas.

Question 9

Arrhenius Model

Answer 9

An acid ionises in water to produce H+ ions in solution
(HCl –> H+ + Cl-)

A base dissociates in water to produce OH- ions in a solution
(NaOH –> Na+ + OH-)