acids bases and alkali + reactions

Question 1

acid + base reaction

Answer 1

acid + base> salt + water
zinc oxide+ sulphuric acid> zinc sulphate + water

Question 2

observations of an acid + base reaction

Answer 2

-base disappears as it is used up in the reaction

Question 3

how to make salt crystals using acid + base reaction

Answer 3

1.) add excess base to hot acid eg ZnO to
H2SO4

2.) filter out excess base, salt solution (ZNSO4) is collected in an evaporating basin

3.) heat salt solution until crystals start to form around edges of basin

4.) cool and leave salt solution to crystalise, evaporation of water allows crystals to form

Question 4

definition of an acid

Answer 4

H+ Donor

Question 5

definition of a base

Answer 5

H+ acceptor

Question 6

acidic PH alkaline ph

Answer 6

7- 7+

Question 7

definition of an alkali

Answer 7

oh+ acceptor

Question 8

name three acids

Answer 8

hydrochloric acid- HCl
Nitric acid- HNO3
sulphuric acid- H2SO4
carbonic acid- H2CO3

Question 9

name 3 alkali

Answer 9

sodium hydroxide- NaOH
Potassium hydroxide-KOH
ammonium hydroxide- NH4OH

Question 10

bases

Answer 10

ammonia
all metal oxides and metal hydroxides

Question 11

acid + carbonate reaction

Answer 11

acid + carbonate> salt + water + carbon dioxide

Question 12

observations of a acid + carbonate reaction

Answer 12

-carbonate disappears- used up in reaction

-fizzing- because a gas is produced