posted by eva .
Please i need sum help in balancing these equations:
Do you mean phorphorus tribromide?
2P + 3Br2 --> 2PBr3
Your teacher may prefer it be written as
P4 + 6Br2 ==> 4PBr3
I don't think the #2 reaction will go. Ca(HCO3)2 is soluble and there is no other driving force.