Transition metals/P3 Oxides

Question 1

Reaction of sodium and water

Answer 1

2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g)

Question 2

Reaction of magnesium and water

Answer 2

Question 3

Reaction of magnesium and steam

Answer 3

Question 4

Period 3 elements reacting with oxygen (Na, Mg, Al, Si, P4, S)

Answer 4

2Na (s) + ½O2 (g) → Na2O (s)
sodium oxide

Mg (s) + ½O2 (g) → MgO (s)
magnesium oxide

2Al (s) + 1½O2 (g) → Al2O3 (s)
aluminium oxide

Si (s) + O2 (g) → SiO2 (s)
silicon dioxide

P4 (s) + 5O2 (g) → P4O10 (s)
phosphorus(V) oxide

S (s) + O2 (g) → SO2 (g)
sulfur dioxide

Question 5

Sodium Oxide and Magnesium Oxide reacting with water

Answer 5

Hydroxide ions are formed
(NaOH is more soluble so forms a more alkaline solution)

Question 6

Reactions of Phosphorus(V) oxide , Sulfur dioxide and Sulfur trioxide with water

Answer 6

The acids formed dissociate in solution to form a conjugate base.

Question 7

Sodium Oxide and Magnesium Oxide reacting with acids

Answer 7

They are basic so will neutralise acids.

Question 8

Silicon Oxide, Phosphorus Oxide and Sulfur Oxides reacting with bases

Answer 8

They are acidic so will neutralise bases

Question 9

Reduction of vanadium using zinc metal (in an acidic solution)

Answer 9

Question 10

Reduction of Tollen’s reagent

Answer 10

Question 11

Redox titration of Fe2+ with MnO4-

Answer 11

Solution turns purple (self indicating)

Question 12

Redox titration of C2O42- with MnO4-

Answer 12

Question 13

The Contact Process

Answer 13

Question 14

Fe2+ catalysing the reaction between S2O82- and I-

Answer 14

Question 15

Mn2+ auto catalysing the reaction between MnO4- and C2O42-

Answer 15

Question 16

Reaction between metal-aqua 2+ ions and water
(eg. Fe2+)

Answer 16

Question 17

Reaction between metal-aqua 3+ ions and water
(eg. Al3+)

Answer 17

Question 18

Metal-aqua 2+ ions and water
(eg. Fe2+)

Answer 18

forms a weakly acidic solution

Question 19

Metal-aqua 3+ ions and water
(eg. Al3+)

Answer 19

Question 20

Adding OH- ions to solutions of metal-aqua 3+ ions (further hydrolysis)

FLAG

Answer 20

Question 21

Adding OH- ions to solutions of metal-aqua 2+ ions (further hydrolysis)

Answer 21

Question 22

Write the two equations of aluminium hydroxide dissolving in excess base, and excess acid.

Answer 22

Question 23

Hydrolysis of metal-aqua ions (eg. Fe3+) using NH3

Answer 23

Question 24

Hydrolysis of metal-aqua ions (eg. Cu2+) using EXCESS NH3

Answer 24

Question 25

Hydrolysis of metal-aqua 2+ ions using Na2CO3

Answer 25

Question 26

Hydrolysis of metal-aqua 3+ ions using Na2CO3

Answer 26

Question 27

Period 3 metals reacting in air (observations)

Answer 27