Equations

Question 1

Group 1 Metal with 02

Answer 1

4M(s) +O2(g) -> 2M2O(s)

Question 2

Group 2 Metal with O2

Answer 2

2M(s) + O2(g) -> 2MO(s)

Question 3

Group 1 Metal with Cl2

Answer 3

2M(s) + Cl2(g) -> 2MCl (s)

Question 4

Group 2 Metal with Cl2

Answer 4

M(s) + Cl2(g) -> MCl2(s)

Question 5

Group 1 metal with H2O

Answer 5

2M(s) + 2H2O(l) -> 2MOH(aq) + H2(g)

Question 6

Group 2 metal with H2O

Answer 6

M(s) + 2H2O(l) -> M(OH)2(aq) + H2(g)

Question 7

Magnesium with steam

Answer 7

Mg(s) + H2O(g) -> MgO(s) + H2(g)

Question 8

Group 1 Metal oxide with water

Answer 8

M2O(s) + H2O(l) -> 2MOH(aq)

Question 9

Group 2 metal oxide with water

Answer 9

MO(s) + H2O(l) -> M(OH)2(aq)

Question 10

Group 1 Metal oxides with acids

Answer 10

M2O(s) + HCl(aq) -> 2MCl(aq) + H2O(l)

Question 11

Group 2 metal oxides with acids

Answer 11

MO(s) + HCl(aq) -> MCl2(aq) + H2O(l)

Question 12

Lesser decomposition of nitrates

Answer 12

2MNO3(s) -> 2MNO2(s) + O2(g)

Question 13

Greater decomposition of nitrates

Answer 13

2M(NO3)2(s) -> 2MO(s) + O2(g) + 4NO2 (g)

Question 14

Group 1 metal hydroxides with acids

Answer 14

MOH(aq) + HCl(aq) -> MCl(aq) + H2O(l)

Question 15

Group 2 metal hydroxides with acids

Answer 15

M(OH)2(aq) + 2HCl(aq) -> MCl2(aq) + 2H2O(l)

Question 16

Full decomposition of carbonates

Answer 16

MCO3(s) -> MO(s) + CO2(g)

Question 17

Disproportionation of Cl with H2O

Answer 17

Cl2(g) + H2O(l) -> HCl(aq) + HClO(aq)

Question 18

Disproportionation of Cl with cold NaOH

Answer 18

Cl2(g) + 2NaOH(aq) -> NaCl(aq) + NaClO(aq) + H2O(l)

Question 19

Disproportionation of Cl with hot alkali

Answer 19

3Cl2(g) + 6NaOH(aq) -> 5NaCl(aq) + NaClO3(aq) + 3H2O(l)

Question 20

Reduction of H2SO4 and which reducing agent reduces it for each

Answer 20

H2SO4(aq) + 2H+(aq) +2e- -> 2H2O(l) + SO2(g). Done by Br/I

H2SO4(aq) + 6H+(aq) +6e- -> 4H2O(l) + S(s). Done by I

H2SO4(aq) + 8H+(aq) + 8e- -> 4H2O(l) +H2S(g). Done by I

Question 21

Ionic equation for precipitation reactions

Answer 21

AgCl(s) + 2NH3(aq) -> [Ag(NH3)2]+(aq) +Cl-(aq)

AgBr(s) + 2NH3(aq) -> [Ag(NH3)2]+(aq) + Br-(aq)

Question 22

Halides in water

Answer 22

HF + H2O -> H3O+ + F-
HCl + H2O -> H3O+ +Cl-

etc.

Question 23

Halides with ammonia

Answer 23

NH3(g) + HCl(aq) -> NH4Cl(s)