I swear, I'm about to give up. I've been working for HOURS on online homework, and I cannot get these double replacements!
Magnesium Sulfate combines with Barium Hydroxide. Write and balance.
I got Mg_2_(SO_4)_2_+2Ba(OH)_2_----> 2Mg(OH)_2_+Ba_2_(SO_4_)_2_
Of course that was wrong. Why don't you use the charges??? Mg has a +2 charge, and Sulfate has a 2- charge. Why wouldn't I cross them? There has to be something I'm not getting, but I've done so many of these problems and gotten them wrong, I'm just about to give up. I've got the other replacements/combinations down fine.
Thank you so much for hopefully saving my sanity!
Edit: Ok, I just moved onto another problem (which I again got wrong) and Zinc Nitrate is Zn(NO_3_)_2_. Why does that one cross, while the above one doesn't? *sighs*