Period 3

Question 1

Na (s) + H2O (l)

Answer 1

Na (s) + H2O (l) → NaOH (aq) + 1/2 H2 (g)

Question 2

Mg (s) + H2O (l)

Answer 2

Mg (s) + 2 H2O (l) → Mg(OH)2 (aq) + H2 (g)

Question 3

Mg (s) + H20 (g)

Answer 3

Mg (s) + H20 (g) → MgO (s) + H2 (g)

Question 4

Cl2 + H2O

Answer 4

Cl2 + H2O ⇌ HClO + HCl

Question 5

Na2O (s) + H2O (l)

Answer 5

Na2O (s) + H2O (l) → 2NaOH (aq)

pH = 12 - 14

Question 6

MgO + H2O

Answer 6

MgO + H2O → Mg(OH)2

pH = 8-10

Question 7

P4O10 + H2O →

Answer 7

P4O10 + 6 H2O → 4 H3PO4

pH = 0-2

Question 8

SO2 + H2O →

Answer 8

SO2 + H2O ⇌ H2SO3

pH = 2-3

Question 9

SO3 + H2O →

Answer 9

SO3 + H2O → H2SO4

pH = 0-2

Question 10

Na2O + H2SO4 →

Answer 10

Na2O + H2SO4 → Na2SO4 + H2O

Question 11

MgO + HCl →

Answer 11

MgO + 2 HCl → MgCl2 + H2O

Question 12

SiO2 + NaOH →

Answer 12

SiO2 + 2 NaOH → Na2SiO3 + H2O

Question 13

P4O10 + NaOH →

Answer 13

P4O10 + 12 NaOH → 4 Na3PO4 + 6 H2O

Question 14

SO2 + NaOH →

Answer 14

SO2 + 2 NaOH → Na2SO3 + H2O

Question 15

SO3 + NaOH →

Answer 15

SO3 + 2 NaOH → Na2SO4 + H2O

Question 16

Al2O3 + HCl →

Answer 16

Al2O3 + 6 HCl → 2 AlCl3 + 3 H2O

Question 17

Al2O3 + HNO3 →

Answer 17

Al2O3 + 6 HNO3 → 2 Al(NO3)3 + 3 H2O

Question 18

Al2O3 + NaOH →

Answer 18

Al2O3 + 2 NaOH + 3 H2O → 2 NaAl(OH)4

Question 19

[Al(H2O)6]3+ + OH- →

Answer 19

[Al(H2O)6]3+ + 3 OH- ⇌ [Al(H2O)3(OH)3] + 3 H2O

Question 20

[Al(H2O)3(OH)3] + H+ →

Answer 20

[Al(H2O)3(OH)3] + 3 H+ → [Al(H2O)6]3+ + 3 H2O

Question 21

[Al(H2O)3(OH)3] + OH- →

Answer 21

[Al(H2O)3(OH)3] + OH- → [Al(H2O)3(OH)4]-