# How do you balance #Al + F_2 -> AlF_3#?

##### 2 Answers

Feb 28, 2016

here F is unbalanced : on right hand side(product side) there are 3 F and on the left hand side there is 2F

use the L.C.M of the two numbers to balance on both sides

here L.C.M of (2,3)=6

so we try to get six F on both sides

now we need to balance Al

Feb 28, 2016

#### Answer:

You balance it stoichiometrically: GARBAGE IN MUST EQUAL GARBAGE OUT.

#### Explanation:

A chemical reaction ALWAYS CONSERVES MASS AND CHARGE:

Is mass conserved in this representation? How? If you have to do calculations with this formula, to make it a little easier on yourself you could write:

What does