Oxidation Numbers in Compounds Quiz

What is the oxidation state of H₂CO₃?

What is the oxidation state of Na₂SO₄?

What is the oxidation state of S₂O₃?

What is the oxidation state of CO₃²⁻?

What is the oxidation state of NO₃²⁻?

What is the oxidation state of N₂O?

What is the oxidation state of P₂O₅?

What is the oxidation state of PO₄³⁻?

What is the oxidation state of Cr₂O₇²⁻?

What is the oxidation state of PF₃?

What is the oxidation state of MnO₄⁻?

What is the oxidation state of PF₅?

What is the oxidation state of As₂O₅?

What is the oxidation state of SiO₂?

What is the oxidation state of HNO₂?

What is the oxidation state of S₂O₃²⁻?

What is the oxidation state of CH₄?

What is the oxidation state of C₂O₄²⁻?

What is the oxidation state of H₂CO₃?

What is the oxidation state of CF₄?

Oxidation Numbers in Compounds

H₂CO₃ (Carbonic Acid):
- Oxidation numbers: +1 for H, +4 for C, -2 for O.
Na₂SO₄ (Sodium Sulfate):
- Oxidation numbers: +1 for Na, +5 for S, -2 for O.
S₂O₃ (Thiosulfate):
- Oxidation numbers: +3 for S, -2 for O.
CO₃²⁻ (Carbonate Ion):
- Oxidation numbers: +4 for C, -2 for O.
NO₃²⁻ (Nitrate Ion):
- Oxidation numbers: +4 for N, -2 for O.
N₂O (Dinitrous Oxide):
- Oxidation numbers: +1 for N, -2 for O.
P₂O₅ (Phosphorus Pentoxide):
- Oxidation numbers: +5 for P, -2 for O.
PO₄³⁻ (Phosphate Ion):
- Oxidation numbers: +5 for P, -2 for O.
Cr₂O₇²⁻ (Dichromate Ion):
- Oxidation numbers: +6 for Cr, -2 for O.
PF₃ (Phosphorus Trifluoride):
- Oxidation numbers: +3 for P, -1 for F.
MnO₄⁻ (Permanganate Ion):
- Oxidation numbers: +7 for Mn, -2 for O.
PF₅ (Phosphorus Pentafluoride):
- Oxidation numbers: +5 for P, -1 for F.
As₂O₅ (Arsenic Pentoxide):
- Oxidation numbers: +5 for As, -2 for O.
SiO₂ (Silicon Dioxide):
- Oxidation numbers: +4 for Si, -2 for O.
HNO₂ (Nitrous Acid):
- Oxidation numbers: +1 for H, +3 for N, -2 for O.
S₂O₃²⁻ (Thiosulfate Ion):
- Oxidation numbers: +2 for S, -2 for O.
CH₄ (Methane):
- Oxidation numbers: -4 for C, +1 for H.
C₂O₄²⁻ (Oxalate Ion):
- Oxidation numbers: +3 for C, -2 for O.
CF₄ (Carbon Tetrafluoride):
- Oxidation numbers: +4 for C, -1 for F.

Key Observations

Oxidation states vary across different compounds and ions, illustrating the diversity of chemical behavior.
Understanding oxidation numbers is crucial for predicting reactivity and bonding in chemical compounds.

Test your knowledge of oxidation numbers in various chemical compounds with this engaging quiz. From carbonic acid to dichromate ions, explore how the oxidation states of elements vary in different compounds. Perfect for chemistry students looking to reinforce their understanding of this important topic.