Chapter 4 -----.1.4- Thermal Stability Of Group 2&1 Compounds

Question 1

Group 1
With heat
Lithium nitrate

Answer 1

Brown fumes

Question 2

Group 1
With heat
Sodium nitrate

Answer 2

No brown fumes

Question 3

Group 1
With heat
Potassium nitrate

Answer 3

No brown fumes

Question 4

Group 1
With heat
Rubidium nitrate

Answer 4

No brown fumes

Question 5

Group 1
With heat
Caesium nitrate

Answer 5

No brown fumes

Question 6

Group 2
With heat
Beryllium nitrate

Answer 6

Brown fumes

Question 7

Group 2
With heat
Magnesium nitrate

Answer 7

Brown fumes

Question 8

Group 2
With heat
Calcium nitrate

Answer 8

Brown fumes

Question 9

Group 2
With heat
Strontium nitrate

Answer 9

Brown fumes

Question 10

Group 2
With heat
Barium nitrate

Answer 10

Brown fumes

Question 11

Group 1
Decomposition
Lithium nitrate

Answer 11

Greater decomposition

Question 12

Group 1
Decomposition
Sodium nitrate

Answer 12

Lesser decomposition

Question 13

Group 1
Decomposition
Potassium nitrate

Answer 13

Lesser decomposition

Question 14

Group 1
Decomposition
Rubidium nitrate

Answer 14

Lesser decomposition

Question 15

Group 1
Decomposition
Caesium nitrate

Answer 15

Lesser decomposition

Question 16

Group 2
Decomposition
Beryllium nitrate

Answer 16

Greater decomposition

Question 17

Flame test

Answer 17

Mix compound w HCl to turn into chloride as more volatile

Question 18

Lithium flame test

Answer 18

Red

Question 19

Sodium flame test

Answer 19

Yellow/orange

Question 20

Potassium flame test

Answer 20

Lilac

Question 21

Rubidium flame test

Answer 21

Red / purple

Question 22

Caesium flame test

Answer 22

Blue/ violet

Question 23

Beryllium flame test

Answer 23

No colour

Question 24

Magnesium flame test

Answer 24

No colour

Question 25

Calcium flame test

Answer 25

Brick red

Question 26

Strontium flame colour

Answer 26

Crimson red

Question 27

Barium flame colour

Answer 27

Apple green

Question 28

Group 2 metals with water down group

Answer 28

Increase down group

Question 29

Group 2 metals with oxygen

Answer 29

Increases vigorously down group

Question 30

Reactions with group 2 metals and chlorine

Answer 30

Increases with vigour down group

Question 31

Magnesium and steam

Answer 31

MgO (s)

Question 32

Group 2 ionisation energies

Answer 32

Decreases down group

Question 33

Group 2 oxides w water

Answer 33

Colourless solution MO(s) + H2O(l) —> M(OH)2(aq)

Question 34

Solubility of group 2 hydroxides

Answer 34

Solubility increases down group | Maximum alkalinity increases down group

Question 35

NaCl and sulfúrico acid

Answer 35

Misty fumes HCl

Question 36

NaBr and sulfúrico acid

Answer 36

Misty fumes Hydrogen Bromide HBr Brown fumes Bromine BR2 Colourless has w choking smell Sulfúr dioxide SO2

Question 37

NaI and sulfuric acid

Answer 37

Misty fumes - hydrogen iodide HI Purple fumes/ black solid - iodine I2 Colourless has w choking smell - sulfúr dioxide SO2 Yellow solid sulfúr S Colourless Gas w rotten egg smell hydrogen sulfide H2S

Question 38

Nitrate

Answer 38

V

Question 39

Nitrite

Answer 39

iii

Question 40

Silver nitrate reaction

Answer 40

Chloride - white ppt Bromide - cream ppt Iodide - yellow ppt

Question 41

Ammonia w halides

Answer 41

Chloride -soluble in dilute aqueous and conc aqueous ammonia Bromide- soluble in dilute aqueous. Insoluble in conc aqueous ammonia Iodide - insoluble in dilute aqueous and concept aqueous ammonia