Release time：2022-07-12

Redox reactions

This mindmap is about redox reactions. It has the following content: - ways to identify redox reactions - oxidation states - oxidation numbers - pauling's scale of electronegativity - 6 rules for assigning oxidation numbers

Edited at 2022-07-12 10:26:47

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Redox reactions

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Outline

Redox reactions

ways to identify redox reactions

loss of electrons

gain of oxygen

increase in oxidation state

oxidation

gain of electrons

loss of oxygen

decrease of oxidation state

reduction

oxidation states

term used when electrons are transferred, strictly used for ionic compounds

loss of electrons

oxidation has occurred

oxidation state has increased

gain in electrons

reduction has occurred

oxidation state has decreased

oxidation numbers

term used for covalent molecules where electrons are shared in the covalent bond

examples of molecules where oxidation state is used

HCl

H2O

what is oxidation number?

a value assigned to a each atom in a compound

a measure of the electron control it has, relative to the atom

Pauling's Scaling of Electronegativity

electronegativity

a measure of an atom's ability to attract electrons

increases from left to right in the periodic table

due to the increase in nuclear charge, resulting in an increased attraction between nucleus and bond electrons

6 rules for assigning oxidation numbers

1. atoms in elemental state

atoms in leemental state have an oxidation state of 0

2. Simple ions

Oxidation number is the same as the charge for simple ions

3. addition of all oxidation numbers in a neutral compound

all oxidation numbers in a neutral compound must add up to 0

4. addition of all oxidation numbers in a charged compound

addition of all oxidation numbers in a charged compound must add up to the charge of the compound

5. usual oxidation number for an element

usual oxidation number of an element is equal to its charge

6. Exceptions to rule 5

some elements' oxidation numbers can change due to the other elements in the compound