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Which ion combines with Ba2+ to form a compound that is most soluble in water? (1) S2- (2) OH- (3) CO32- (4) SO42-
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Which ion combines with Ba2+ to form a compound that is most soluble in water?

(1) S2- (2) OH- (3) CO32- (4) SO42-

User Joseph Ferris
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Only Ba(OH)2 is soluble in water. BaS, BaCO3, and BaSO4 are precipitates.
(2) OH- is the correct answer.
Hope this would help~
User Levi H
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