Redox Flashcards

1
Q

OILRIG

A

Oxidation Is Loss Reduction Is Gain

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2
Q

What is a redox reaction?

A

Where there is simultaneous oxidation and reduction

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3
Q

What is the role of the oxidising agent?

A

Electron acceptor

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4
Q

What is the role of the reducing agent?

A

Electron donor

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5
Q

What is the oxidation number of an element in its standard state?

A

0

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6
Q

What is the oxidation number of an ion

A

It is equal to its preferred ionic charge

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7
Q

What is the oxidation number of hydrogen in a compound

A

+1

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8
Q

What is the oxidation number of oxygen in a compound

A

-2

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9
Q

What is the oxidation number sum of the atoms in a compound

A

0

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10
Q

What is the oxidation number of atoms in a polyatomic ion

A

It sums to the charge of the ion
E,g, SO4 (2-) = -2

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11
Q

What are the 3 exceptions for oxidation number

A

1) oxygen is not -2 if it is in a compound with Fluorine
2) Oxygen is not -2 if it is in a peroxide compound, it is -1 instead
3) H is not +1 if it is in a metal hydride, it is -1 instead

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12
Q

Oxidation and Reduction of 2Na + Cl2 —> 2NaCl

A

Oxidation = Na —> Na+ + e-
Reduction = 2e- + Cl2 —> 2Cl-

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13
Q

Steps to balance with an ACID

A
  1. Balance for the element that is changing oxidation state
  2. add water to the side that needs oxygen
  3. Add H+ to the side that needs hydrogen
  4. Balance with electrons
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