REDOX Part 2

ROTTING!

RUST!

COMBUSTION!

This is a redox process by which

YOUR BODY STORES ENERGY.

An oxidation-reduction reaction (redox for short) is:

If you have one of these processes, you must have the other. Why?

The number of electrons lost and gained in a reaction must be equal.

What Law demands this?

You can use this fact to help balance difficult equations.

For example: the space shuttle was lifted off the earth by this tough redox reaction:

NH4ClO4 + Al → Al2O3 + HCl + N2 + H2O

The copper atoms

LOST ELECTRONS; i.e., they were

Cu0 (s) → Cu2+(aq) + 2e1-

The silver ions GAINED ELECTRONS; i.e., they were

1e- + Ag1+(aq) → Ag0 (s)

How will you remember which is OXIDATION, and which is REDUCTION?

This type of reaction is ___________ a redox reaction.

Single replacement Combustion

Combination Decomposition reactions

Double replacement

We will be doing a demonstration that includes redox reactions. The demo is called the

“Hindenburg.” It was the “pride” of Nazi Germany – and capable of crossing the Atlantic Ocean.

(1930’s)

For our demonstration, we will create

a model of the Hindenburg.

To generate the hydrogen gas:

aluminum + hydrochloric acid

1. __Mg + __Al(NO3)3 → __Mg(NO3)2 + __Al

2. __Li + __CaCl2 → __LiCl + __Ca

3. __K + __H3PO4 → __K3PO4 + __H2