2.1.2 Compounds, formulae and equations

Question 1

give the charge of sodium

Answer 1

na+

Question 2

give the charge of potassium

Answer 2

k+

Question 3

give the charge of silver

Answer 3

ag+

Question 4

give the charge of hydrogen

Answer 4

H+

Question 5

give the charge of ammonium

Answer 5

nh4+

Question 6

give the charge of copper 1

Answer 6

cu+

Question 7

give the charge of magnesium

Answer 7

mg+2

Question 8

give the charge of calcium

Answer 8

ca+2

Question 9

give the charge of iron 2

Answer 9

fe+2

Question 10

give the charge of zinc

Answer 10

zn+2

Question 11

give the charge of lead 2

Answer 11

pb+2

Question 12

give the charge of copper 2

Answer 12

cu+2

Question 13

give the charge of nickel 2

Answer 13

ni+2

Question 14

give the charge of aluminium

Answer 14

al+3

Question 15

give the charge of chromium 3

Answer 15

cr+3

Question 16

give the charge of iron 3

Answer 16

fe+3

Question 17

give the charge of hydroxide

Answer 17

oh-

Question 18

give the charge of sulphate

Answer 18

so4-2

Question 19

give the charge of carbonate

Answer 19

co3-2

Question 20

give the charge of nitrate

Answer 20

no3-

Question 21

give the charge of hydrogencarbonate

Answer 21

hco3-

Question 22

give the charge of phosphate

Answer 22

po4-3

Question 23

give the charge of manganate

Answer 23

mno4-1

Question 24

give the charge of chromate 4

Answer 24

cro4-2

Question 25

give the charge of dichromate

Answer 25

cr2o7-2

Question 26

give the charge of sulphite

Answer 26

so3-2

Question 27

state the solubility of nitrates

Answer 27

all soluble

Question 28

state the solubility of sulphates

Answer 28

mostly soluble except for lead sulphate and barium sulphate

Question 29

state the solubility of chlorides, bromides and iodides

Answer 29

mostly soluble is except for lead and silver halides

Question 30

state the solubility of carbonates

Answer 30

mostly insoluble except for sodium carbonate and potassium carbonate

Question 31

state the solubility hydroxides

Answer 31

mostly insoluble except for sodium hydroxide and potassium hydroxide

Question 32

state the solubility of oxides

Answer 32

all insoluble

Question 33

acid + alkali =

Answer 33

salt + water

Question 34

acid + metal carbonate =

Answer 34

salt + water + carbon dioxide

Question 35

acid + metal oxide =

Answer 35

salt + water

Question 36

displacement reaction

more reactive metal + less reactive metal compound solution =

Answer 36

more reactive metal compound solution + less reactive metal

Question 37

precipitation reaction

AX (aq) + BY (aq) =

Answer 37

BX (s) + AY (aq)