I wouldn't pick any of them.
CO3^2- + HOH == HCO3^- + OH^-
PO4^3- + HOH ==> HPO4^2- + OH^-
LiOH(aq) ==> Li^+ + OH^-
CH3OH ==> doesn't ionize with water.
One could argue that HCO3^- does ionize slightly to H^+ and CO3^2- and HPO4^2- ionizes slightly to H^+ + PO4^3- but I don't think that is what is meant by the problem.
When one of the following substances is dissolved in water, the only positive ions in the solution are hydrogen ions.
CH3OH
LiOH
PO4 -3
CO 3 -2
1 answer