Help Please With Chemistry!?

Please explain if you can and Thank you!
-Which ionic species are present in a aqueous of the following?

Mg(NO3)2 =__________+_____________
KOH =____________+____________
CaF2= __________+__________

naresh v2012-02-29T22:09:26Z

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Mg2+ + NO3-

K+ + OH-

Ca2+ + F-
In addition H+ and OH- from water in each soln.