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Balanced?

2Al + 3Br2

2AlBr3

Al: 2

Br:2x3=6

Al: 2

Br:6

Reaction Type

Balanced

AlBr

Al + Br

AB

A + B

Synthesis:

The elements combined, becoming simplified.

Not

Balanced

The reaction is exothermic. By combining the two elements a lot of heat is given off.

Reaction

Aluminum (Al)

Bromine (Br)

Aluminum-Bromide Reaction

Half-Reaction

Step 1: Balance Equation [COMPLETE]

Step 2: Identifying Oxidation/Reduction [COMPLETE]

Step 3: Seperate the elements, showing change

Step 4: Placing electrons to balence the half reaction

Step 5: Set electrons equal in both half-reaction

Step 6: Bask in the glory of being done

2Al + 3Br2

2AlBr3

What happens when you combine

the two?

Aluminum

Oxidation #

Bromide

2Al (0) --> 2Al (+3)

2Br3 (0) --> 3Br2 (-1)

Two elements combine creating Aluminum-Bromide

Which side of the equation to add the electrons to?

2Al (0) --> 2Al (+3) + e (-)

3Br2 (0) + e (-) --> 2Br3 (-6)

0 = Possitive [+3] + Negative Charge [Electrons]

Positive [0] + Negative Charge (Electrons) = -1

6 Al (+1) = 6e (-) =0

6Br (0) + 6e (-6) = 6Br (-6)

2AlBr3

2Al + 3Br2

6Al (0) --> 2Al (+3) + 6e

3Br2 + 6e --> 6Br

Balanced?

3Br2 (-1) + 6e --> 6Br

6Al --> 2Al (+3) + 6e

6 electrons = 6electrons

6 electrons in, 6 electrons out

Br: electrons out

Al: electrons in

Al: 0 [rule 1 first]

Br: 0 [rule 1]

Al: +1 -- +3

3Br: -1

Al: 0 --> +3; Lossed Electrons

Br: 0 --> -1; Gained Electrons

Al = Oxidized = Reducing Agent

Br = Reduced = Oxidizing Agent

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