Inorganic Chemistry equations: group 2

Question 1

1st Ionisation energy:

Answer 1

X(g) → X+ (g) + e-

Question 2

Group 2 and oxygen:

Answer 2

2M (s) + O2 (g) → 2MO (s)

Question 3

Group 2 and water:

Answer 3

M (s) + 2H2O (l) → M(OH)2 (s) + H2 (g)

Question 4

Mg and steam:

Answer 4

Mg (s) + H2O (g) → MgO (s) + H2 (g)

Question 5

Group 2 and HCl:

Answer 5

M (s) + 2HCl (aq) → MCl2 (aq) + H2 (g)

Question 6

Group 2 and H2SO4:

Answer 6

M (s) + H2SO4 (aq) → MSO4 (aq) + H2 (g)
NB: SrSO4 and BaSO4 insoluble

Question 7

Test for SO42-, ionic:

Answer 7

Ba2+ (aq) + SO42- (aq) → BaSO4 (s)

Question 8

Extraction of Ti:

Answer 8

TiO2 + 2Cl2 + 2C → TiCl4 + 2CO
TiCl4 + 2 Mg → Ti + 2 MgCl2

Question 9

Removal of SO2:

Answer 9

CaO (s) + 2H2O (l) + SO2 (g) → CaSO3 (s) + 2H2O (l)
CaCO3(s) + 2H2O(l) + SO2(g) → CaSO3 (s) + 2H2O(l) + CO2(g)

Question 10

Displacement reactions of Group 7:

Answer 10

Cl2 (aq) + 2Br- (aq) → 2Cl- (aq) + Br2 (aq)
Cl2 (aq) + 2I- (aq) → 2Cl- (aq) + I2 (aq)
Br2 (aq) + 2I- (aq) → 2Br- (aq) + I2 (aq)

Question 11

Chlorine:

Answer 11

2NaOH (aq) + Cl2 (g) → NaClO (aq) + NaCl (aq) + H2O (l)
Cl2 (g) + H2O (l) ⇄ 2H+ (aq) + Cl- (aq) + ClO- (aq)
2 Cl2 (g) + 2 H2O (l) ⇄ 4H+ (aq) + 4Cl- (aq) + O2 (g)

Question 12

Halides and c. H2SO4
NaF/NaCl:

Answer 12

NaCl (s) + H2SO4 (aq) → NaHSO4 (s) + HCl (g)

Question 13

Halides and c. H2SO4
NaBr:

Answer 13

NaBr (s) + H2SO4 (aq) → NaHSO4 (s) + HBr (g)
2HBr (g) + H2SO4 (aq) → Br2 (g) + SO2 (g) + 2H2O (l)

Question 14

Halides and c. H2SO4
NaI:

Answer 14

NaI (s) + H2SO4 (aq) → NaHSO4 (s) + HI (g)
2HI (g) + H2SO4 (aq) → I2 (g) + SO2 (g) + 2H2O (l)
6HI (g) + H2SO4 (aq) → Br2 (g) + SO2 (g) + 2H2O (l)

Question 15

Inorganic ion tests:

Answer 15

NH4+ (aq) + OH- (aq) → NH3 (g) + H2O (l)

CO32- (aq) + 2H+ (aq) → CO2 (g) + H2O (l)

Question 16

Test for halides:

Answer 16

Ag+ (aq) + X- (aq) → AgX (s)