How do you balance #P_4 + Br_2 -> PBr_3#?

1 Answer
Mar 7, 2016

Answer:

We must make sure the number of molecules in each element on each side of the equation are equal.

Explanation:

The lowest number of #P_4# that we can have is #1P_4#, which means one molecule of 4 atoms of phosphorus.

This means we need 4 P atoms on the other side. We do this by making the equation:

#1P_4 + Br_2 -> 4PBr_3#

This means that we have (#4 xx 3 = 12)# atoms of bromine. To finish the balancing process, we need to balance the bromine on the other side of the equation. It would be #6br_2# to make 12 atoms of bromine.

So, your equation will be #P_4 + 6Br_2 -> 4PBr_3#

Hopefully this helps!