Mmuae Afoforo a Wobɛpaw:
Reduced
Oxidised
Classify the first column as oxidation or reduction.
The second column gives the reduction half equation for each change.
2 e-
e-
3e-
Nuclear energy
What is the oxidation number of Br?
-2 | -1 | 0 | +1 | +2 | +3 | +4 | +5 | |
|---|---|---|---|---|---|---|---|---|
Br₂ | ||||||||
HBr | ||||||||
HBrO₃ | ||||||||
HOBr | ||||||||
NaBr | ||||||||
KBr | ||||||||
MgBr₂ | ||||||||
AlBr₃ |
What is the oxidation number of Sulfur ?
-2 | 0 | +2 | +4 | +6 | |
|---|---|---|---|---|---|
H₂S | |||||
S₈ | |||||
SO₂ | |||||
SO₃ | |||||
H₂SO₄ | |||||
Na₂SO₄ | |||||
MgSO₄ |
What is the oxidation number of Al?
What is the oxidation number of oxygen in O₂ ?
What is the oxidation number of iodine in I₂ ?
What is the oxidation number of Nitrogen
-3 | 0 | +2 | +3 | +4 | +5 | |
|---|---|---|---|---|---|---|
N₂ | ||||||
NaNO₃ | ||||||
NH₃ | ||||||
NO₃⁻ | ||||||
HNO₃ | ||||||
Mg(NO₃)₂ | ||||||
NH₄⁺ | ||||||
NO | ||||||
NO₂ | ||||||
NO₂⁻ |
What is the oxidation number of hydrogen?
-1 | 0 | +1 | |
|---|---|---|---|
H₂ | |||
H₂O | |||
NaH | |||
H₂O₂ | |||
CH₄ |
What is the oxidation number of oxygen?
-2 | -1 | 0 | +1 | +2 | |
|---|---|---|---|---|---|
O₂ | |||||
H₂O | |||||
H₂O₂ | |||||
Na₂O | |||||
MgO | |||||
H₂SO₄ | |||||
F₂O |
2 Ca(NO₃)₂ → 2 CaO + 4 NO₂ + O₂ (thermal decomposition of calcium nitrate)
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
NO₂ | arrow_right_alt | 2+ |
CaO | arrow_right_alt | 2- |
O₂ | arrow_right_alt | 4+ |
CaO | arrow_right_alt | 0 |
2 Ca(NO₃)₂ → 2 CaO + 4 NO₂ + O₂ (thermal decomposition of calcium nitrate)
Oxidation number of Ca in reactants =
Oxidation number of Ca in products =
Change in oxidation number =
Ca has
2 Ca(NO₃)₂ → 2 CaO + 4 NO₂ + O₂ (thermal decomposition of calcium nitrate)
Oxidation number of N in reactants =
Oxidation number of N in products =
Change in oxidation number =
O has been
so N has been
2 Ca(NO₃)₂ → 2 CaO + 4 NO₂ + O₂ (thermal decomposition of calcium nitrate)
Oxidation number of O2- in Ca(NO₃)₂ =
Oxidation number of O2- in CaO =
Oxidation number of O2- in NO₂ =
Oxidation number of O in O₂ =
Change in oxidation number =
O2- has been
O2- has acted as a
Fill in the oxidation numbers for magneisum (Reaction of magnesium with water).
Fill in the oxidation numbers for hydrogen
Change in magnesium.
The magnesium has been
The oxidation number has from to
The magnesium has acted as a agent.
Mg → Mg²⁺ + 2e⁻ magnesium atoms have electrons.
Change in hydrogen in the reaction of magnesium with water
Oxidation number of H+ in water is
Oxidation number H in H2 is
The oxidation number has so the H+ has been
The H+ has acted as an agent.
2H⁺ + 2e⁻ → H₂ reduction is of electrons.
Change in hydrogen in the reaction of magnesium with steam
Oxidation number of H+ in water is
Oxidation number of H+ in OH- is
Oxidation number H in H2 is
The oxidation number has so the H+ has been
The H+ has acted as an agent.
2H⁺ + 2e⁻ → H₂ reduction is of electrons.
(note some H+ ions are neither oxidised or reduced).
Fill in the oxidation numbers
2 Ca(NO₃)₂ → 2 CaO + 4 NO₂ + O₂ (thermal decomposition of calcium nitrate)
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Ca(NO₃)₂ | arrow_right_alt | 2+ |
Ca(NO₃)₂ | arrow_right_alt | 5+ |
Ca(NO₃)₂ | arrow_right_alt | 2- |
