Just a couple of fixes…You wrote” “Sr(NO3)2 + Na2SO4 —–> Sr(SO4)2 + Na2NO3 “These are not the correct formulas for the products. Strontium sulfate is SrSO4, and sodium nitrate is NaNO3.Mauri doesn’t mean “formal charge”. He means “oxidation number”. Strontium has an oxidation number of +2 and sodium has an oxidation number of +1. Formal charge is determined from the bonding details in a molecule. Specifically, the number of bonding electrons and lone pairs.And JAS makes this statement, “All group I ions are soluble.” “Soluble” or “insoluble” only refer to compounds. The individual ions cannot be “insoluble”, only a compound that they might be part of. This is a case of misinterpreting the solubility rules. For instance, it doesn’t say that Na+ is soluble, it says that sodium compounds are soluble in water. It doesn’t say that SO4= ion is insoluble, it says that only certain sulfate compounds (SrSO4, BaSO4, PbSO4 …) are insoluble.Remember, it’s not individual ions that are soluble or insoluble, it’s compounds that are soluble or insoluble.Finally, JAS has the correctly balanced equations, Mauri does not. Neither has done the obvious and simply add the state symbols. I require my students to include state symbols in an exercise like this.Sr(NO3)2(aq) + Na2SO4(aq) —> SrSO4(s) + 2NaNO3(aq)======== Follow up =========Sorry if I sound like a old, picky chemistry teacher. That’s because I’m an old, picky chemistry teacher. Mauri has made the fixes I suggested. Now it looks much better. Thank you....
Show More