J.R. S. answered 06/01/17
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Al(NO3)3(aq) + 3KOH(aq) ===> Al(OH)3(s) + 3KNO3(aq)
The reactants are both soluble as indicated by the fact that they are "aqueous". On the product side, aluminum hydroxide, Al(OH)3 is insoluble and is indicated as (s) and potassium nitrate is soluble.