Chemical Equations

Question

Consider the reaction when aqueous solutions of magnesium bromide and barium hydroxide are combined. The net ionic equation for this reaction is:

Answer 1

Jaime,

I'll do this one and hopefully you'll see how to do it, so you can do the rest of the problems that you posted. It's really not a good idea to post a whole bunch of questions (most of which are the same or similar), because tutors tend not to want to do someone's homework for them. So, here is a step-wise approach to do these problems, and you should learn it and try to do the others.

magnesium bromide = MgBr₂

barium hydroxide = Ba(OH)₂

First, we will write the correctly balanced molecular (complete) equation:

MgBr₂(aq) + Ba(OH)₂(aq) ==> Mg(OH)₂(s) + BaBr₂(aq)

Next, we will write the complete ionic equation (break up aq compounds, leave solids alone)

Mg²⁺(aq) + 2Br^-(aq) + Ba²⁺(aq) + 2OH^-(aq) ==> Mg(OH)₂(s) + Ba²⁺(aq) + 2Br^-(aq)

Finally, remove the spectator ions (those that appear the same on both sides), and you're done

Mg²⁺(aq) + 2OH^-(aq) ==> Mg(OH)₂(s) NET IONIC EQUATION