Question

Please Help!!! Balance and determine what type of reaction these are

1. ____KBr+____Cl2 ------> _____KCl+Br2
2. ___Mg+___Fe2o3 ------> ___MgO+___Fe


(After you Answer it can you please explain it to me? I'm really not understanding it )​

Answer 1

Explanation: 2 KBr + Cl2 --> 2KCl + Br2 (single replacement or single displacement depending on your textbook)

3 Mg + Fe2O3 --> 3 MgO + 2 Fe Single replacment

Both sides have to equal each other so you need 2 in front of KBr to have 2 K and 2 Br, you need 2 infront of KCl to have 2 of each. Its because of the Cl2 and Br2 in the equation.

Because you have a 2 in Fe2O3 you put the 2 in front of Fe. Because you have a 3 after the O in Fe2O3 you put a 3 in front of MgO. Because you put the 3 in front of MgO you put a 3 in front of Mg.

You have to have the same number before and after the -->