Back to AI Flashcard MakerChemistry /A-level Chemistry: 3.1.7 Oxidation, Reduction and Redox Equations

A-level Chemistry: 3.1.7 Oxidation, Reduction and Redox Equations

Chemistry33 CardsCreated 2 months ago

This deck covers key concepts in oxidation, reduction, and redox equations, including definitions, oxidation states, and half-equations.

What is oxidation?

  • Loss of electrons

  • Gain of oxygen

  • (Loss of hydrogen)

Tap or swipe ↕ to flip
Swipe ←→Navigate
1/33

Key Terms

Term
Definition

What is oxidation?

  • Loss of electrons

  • Gain of oxygen

  • (Loss of hydrogen)

What is reduction?

  • Gain of electrons

  • Loss of oxygen

  • (Gain of hydrogen)

What is does an oxidising agent do?
Accepts electrons and gets reduced
What is does a reducing agent do?
Donates electrons and gets oxidised
What is a redox reaction?
When reduction and oxidation happen simultaneously

What do oxidation states tell you?

Charge on an ion or element or atom

(Tells you total number of electrons element/compou...

Related Flashcard Decks

Study Tips

  • Press F to enter focus mode for distraction-free studying
  • Review cards regularly to improve retention
  • Try to recall the answer before flipping the card
  • Share this deck with friends to study together
TermDefinition

What is oxidation?

  • Loss of electrons

  • Gain of oxygen

  • (Loss of hydrogen)

What is reduction?

  • Gain of electrons

  • Loss of oxygen

  • (Gain of hydrogen)

What is does an oxidising agent do?
Accepts electrons and gets reduced
What is does a reducing agent do?
Donates electrons and gets oxidised
What is a redox reaction?
When reduction and oxidation happen simultaneously

What do oxidation states tell you?

Charge on an ion or element or atom

(Tells you total number of electrons element/compound has donated or accepted)

____ ______ show Oxidation States
Roman numerals
What is the oxidation state for uncombined elements (e.g. He)?
0
What is the oxidation state for elements bonded to identical atoms (e.g. O2, H2)?
0
What is the oxidation state for a simple monatomic ion (Na+)?
Same as its charge (e.g +1)
What is the overall oxidation state for compound ions?
The ion charge
What is the sum of oxidation states for a neutral compound?
0

What is the oxidation state for oxygen? & list the expections

  • -2 oxidation state in its compounds

  • Expect in peroxides (compounds with the structure R−O−O−R) = -1

  • & fluorides = +2

What is the oxidation state for hydrogen? & list the expections

  • +1 oxidation state in its compounds

  • Expect in metal hydrides (hydrogen compounds bonded to metal) = -1

State the oxidation state of O in H2O
-2
State the oxidation state of O in H2O2
-1
State the oxidation state of H in HF
+1
State the oxidation state of H in NaH
-1
What is the oxidation state for fluorine?
-1
What is the oxidation state for aluminium?
+3
What is the oxidation state for carbon?
±4
Transition metals have a _____ ____ up to _
postive charge up to 7
State the oxidation state of Cl in Cl2O7
+7
State the oxidation state of Mn and O in MnO42-
Mn = +6 & O = -2
Write the equation for an oxidation reaction
Reductant → product + e-
Write the equation for an reduction reaction
Oxidant + e- → product
In oxidation, the oxidation number _____
increases (electrons lost)
In reduction, the oxidation number _____
decreases (electrons gained)
Write the half equation for VO2+ → VO2+
VO2+ + H2O → VO2+ + e- + 2 H+
Write the half equation for BrO3- → Br2
2 BrO3- + 10 e- + 12 H+ → Br2 + 6 H2O
Combine these half equations
MnO-4 + 8 H+ + 5 e- → Mn2+ + 4 H2O
2Cl- → Cl2 + 2 e-
2 MnO-4 + 16 H+ + 10 Cl- → 2 Mn2+ + 8 H2O + 5 Cl2
Combine these half equations H2O2 → 2 H+ + O2 + 2 e- MnO4- + 8 H+ + 5 e- → Mn2+ + 4 H2O
5 H2O2 + 2 MnO4- + 6 H+ → 2 Mn2+ + 8 H2O + 5 O2