Redox Reactions

What does transfer of electrons through metal wires provide us with

electricity

What can chemical reactions be used to generate

an electric potential in the form of batteries

Why isn’t everything done with batteries? Why aren’t all cars electric?

We are not the best at creating batteries

Explain why we must understand REDOX

to understand electrochemistry and its applications

What do redox reactions feature

the transfer of electrons as the critical event

Define oxidized

lose electrons

Define reduced

gains electrons

Define reducing agent

giving the electrons, oxidized

Define oxidizing agent

getting the electrons, reduced

What side of the equation do we analyze when we look at redox reactions

left

Explain how redox reactions are analyzed and balanced by

looking at oxidation states of atoms, and how these change over the reaction

How are Oxidation numbers assigned to atoms

by applying a set of rules to elements, compounds, and polyatomic ions

What is the ON of pure elements

0

ON of monoatomic ions

equal to its charge

F,CL,BR, and I have ON of -1 unless

CL,Br, and I are combined with F or O

Oxygen has ON of -2 unless

it is a pure element, or as a peroxide or superoxide, or is combined with F

Hydrogen has ON of -1 when combined with

metals

Hydrogen has ON of +1 when combined with

non metals

What is the sum of all ONs of all atoms in a species equal to

total charge of the species

What is the purpose of the activity series

to product whether a redox reaction occurs as-written

The higher an element is on the activity series,

the more easily oxidized