Chapt 20

What is the oxidation number of an atom in its elemental form?

0

What is the oxidation number of a monatomic ion?

The charge on the ion

What is the oxidation number of **oxygen** in compounds and polyatomic ions?

Usually -2

What is the oxidation number of **hydrogen** in compounds and polyatomic ions?

Usually +1

What is the oxidation number of **fluorine**?

Always -1

What is Zn in this picture

Anode

Which way do the K^+ ions migrate

towards the cathode

Mass of the the cathode does what in this process

It increases as the electrons flow

How do the electrons flow

Spontaneously from the anode to the cathode

Which is element is the the cathode

Pb

The anode always does what

Oxidizes during the reaction

The cathode always does what

Reduces during the reaction

What comes first in voltaic notation

the anode(meaning oxidation)

What comes after the double line in voltaic notation

the cathode (meaning reduction)

How does a voltaic cell work

A voltaic cell generates electrical energy through spontaneous redox reactions

How does a Electrolytic cell work

generates energy by a non-spontaneous chemical reaction using an external power source, through the process of electrolysis.

The stronger the reduction potential the stronger the what

the oxidizing agent

The strong the oxidizing potential the stronger the what

the reduction agent

The stronger the reduction potential____________ the oxidation potential

the weaker

the stronger the oxidation potential _________ the reduction potential

the weaker