Oxide equations inorganic chemistry

Question 1

Sodium oxide
give the formula, structure/bonding and its reactivity

Answer 1

Na2O
Ionic
Vigorous

Question 2

Magnesium Oxide
give formula
structure/bonding
reactivity

Answer 2

MgO
Ionic
Vigorous

Question 3

Aluminium Oxide
give formula
structure/bonding
reactivity

Answer 3

Al2O3
ionic (covalent character)
slow (fast if powdered)

Question 4

Silicon dioxide
give formula
structure/bonding
reactivity

Answer 4

macro molecular
SiO2
slow

Question 5

Phosphorus oxide
give formula
structure/bonding
reactivity

Answer 5

P4O10
simple covalent
vigorous

Question 6

Sulfur dioxide
give formula
structure/bonding
reactivity

Answer 6

SO2
simple covalent
burns steadily

Question 7

Eq for Sodium oxide + water

Answer 7

Na2O + H2O ————> 2NaOH

Question 8

Eq for Magnesium oxide + water

Answer 8

MgO + H2O ———-> Mg(OH)2

Question 9

Eq for phosphorus oxide + water

Answer 9

P4O10 + H2O ——-> 4H3PO4 (phosphoric acid)

Question 10

Eq for sulfur dioxide + water

Answer 10

SO2 + H2O ——-> H2SO3 (sulfurous acid)

Question 11

Eq for sulfur trioxide + water

Answer 11

SO3 + H2O ———-> H2SO4 (sulphuric acid)

Question 12

what do ionic oxides make when combined with water

Answer 12

alkaline solutions

Question 13

what do simple covalent oxides of sulfur and phosphorus make when combined with water

Answer 13

acidic solutions

Question 14

silicon dioxide + sodium hydroxide

Answer 14

SiO2 + 2NaOH ——-> Na2SiO3 + H20

Question 15

Phosphorus oxide + sodium hydroxide

Answer 15

P4O10 + 12NaOH ——-> 4 Na3PO4 + 6H2O

Question 16

Sulfur dioxide + sodium hydroxide

Answer 16

SO2 + 2NaOH ——-> Na2SO3 + H2O

Question 17

sulfur trioxide + sodium hydroxide

Answer 17

SO3 + 2NaOH ——-> Na2SO4 + H20

Question 18

why is aluminium oxide (Al2O3) insoluble in water

Answer 18

the bonding is partially ionic and covalent so the ions don’t dissociate

Question 19

what is a substance that can act as both an acid and a base known as

Answer 19

amphoteric

Question 20

aluminium oxide + sulfuric acid

Answer 20

Al2O3 + 3H2SO4 ———> Al2(SO4)3 + 3H2O

Question 21

aluminium oxide + sodium hydroxide + water

Answer 21

Al2O3 + 2NaOH + 3H2O ———> 2NaAl(OH)4

Question 22

what’s more reactive sodium or magnesium and why

Answer 22

Sodium
only has to lose 1 electron to form an ion whereas magnesium has to lose 2 so less energy is required hence more reactive

Question 23

how can the speed of reaction of magnesium with water be increased and why

Answer 23

use steam
steam provides the reaction with greater energy resulting in a violent reaction and a bright white flame