Solubility Rules Compounds containing group 1 alkali metals or ammonium (NH4+) are soluble.
Nitrates (NO3−), chlorates (ClO3−), perchlorates (ClO4−), and acetates (C2H3O2−) are soluble.
Chlorides (Cl−), bromides (Br−), and iodides (I−) are soluble, except for compounds containing silver (Ag+), mercury(I) (Hg22+), and lead (Pb2+).
Sulfates (SO42−) are soluble, except for compounds containing calcium (Ca2+), strontium (Sr2+), barium (Ba2+), and lead (Pb2+).
Hydroxides (OH−), carbonates (CO32−), and phosphates (PO43−) are insoluble, except for compounds containing group 1 alkali metals and ammonium (NH4+).
Sulfides (S2−) are insoluble, except for compounds containing group 1 alkali metals, ammonium (NH4+), magnesium (Mg2+), calcium (Ca2+), strontium (Sr2+), and barium (Ba2+).

Select the correct answer.

Use the solubility rules and the periodic table to predict the product that will precipitate out in the reaction.

K2SO4(aq) + Ba(NO3)2(aq) → ?

A.
KNO3
B.
Ba(NO3)2
C.
K2SO4
D.
K2Ba
E.
BaSO4