1.7 Oxidation, Reduction and Redox Equations Flashcards

1
Q

What is oxidation?

A
  • Loss of electrons
  • Gain of oxygen
  • (Loss of hydrogen)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is reduction?

A
  • Gain of electrons
  • Loss of oxygen
  • (Gain of hydrogen)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is does an oxidising agent do?

A

Accepts electrons and gets reduced

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is does a reducing agent do?

A

Donates electrons and gets oxidised

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a redox reaction?

A

When reduction and oxidation happen simultaneously

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What do oxidation states tell you?

A

Charge on an ion or element or atom

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

____ ______ show Oxidation States

A

Roman numerals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the oxidation state for uncombined elements (e.g. He)?

A

0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the oxidation state for elements bonded to identical atoms (e.g. O2, H2)?

A

0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the oxidation state for a simple monatomic ion (Na+)?

A

Same as its charge (e.g +1)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the overall oxidation state for compound ions?

A

The ion charge

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is the sum of oxidation states for a neutral compound?

A

0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

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

A
  • -2 oxidation state in its compounds
  • Expect in peroxides (compounds with the structure R−O−O−R) = -1
  • & fluorides = +2
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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

A
  • +1 oxidation state in its compounds
  • Expect in metal hydrides (hydrogen compounds bonded to metal) = -1
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

State the oxidation state of O in H2O

A

-2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

State the oxidation state of O in H2O2

A

-1

17
Q

State the oxidation state of H in HF

A

+1

18
Q

State the oxidation state of H in NaH

A

-1

19
Q

What is the oxidation state for fluorine?

A

-1

20
Q

What is the oxidation state for aluminium?

A

+3

21
Q

What is the oxidation state for carbon?

A

±4

22
Q

Transition metals have a _____ ____ up to _

A

postive charge up to 7

23
Q

State the oxidation state of Cl in Cl2O7

A

+7

24
Q

State the oxidation state of Mn and O in MnO42-

A

Mn = +6 & O = -2

25
Q

Write the equation for an oxidation reaction

A

Reductant → product + e-

26
Q

Write the equation for an reduction reaction

A

Oxidant + e- → product

27
Q

In oxidation, the oxidation number _____

A

increases (electrons lost)

28
Q

In reduction, the oxidation number _____

A

decreases (electrons gained)

29
Q

Write the half equation for VO2+ → VO2+

A

VO2+ + H2O → VO2+ + e- + 2 H+

30
Q

Write the half equation for BrO3- → Br2

A

2 BrO3- + 10 e- + 12 H+ → Br2 + 6 H2O

31
Q

Combine these half equations

MnO-4 + 8 H+ + 5 e- → Mn2+ + 4 H2O

2Cl- → Cl2 + 2 e-

A

2 MnO-4 + 16 H+ + 10 Cl- → 2 Mn2+ + 8 H2O + 5 Cl2

32
Q

Combine these half equations

H2O2 → 2 H+ + O2 + 2 e-

MnO4- + 8 H+ + 5 e- → Mn2+ + 4 H2O

A

5 H2O2 + 2 MnO4- + 6 H+ → 2 Mn2+ + 8 H2O + 5 O2

33
Q

Write the full equation for.

A
34
Q

Write the full equation for

A