We are given the following chemical reaction to balance:
___CdF2 + __CrBr3 --> ___CdBr2 + ___CrF3
1. Balance the Cd first
3CdF2 + ___CrBr3 → 3CdBr2 +__CrF3
2. Then balance Cr
3CdF2 + 2CrBr3 → 3CdBr2 + 2CrF3
3. Check if atoms on both sides have similar numbers of molecules
we have 3 Cd : 3Cd
6F : 6 F
2Cr : 2Cr
(2*3 =6), so 6Br : 6 Br ( 3*2=6)
Our molecules on both sides of the equation balances.
Therefore, our balanced equation will be : 3CdF2 + 2CrBr3 → 3CdBr2 + 2CrF3