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Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Guide :High School

Which of the following pairs of aqueous solutions will form a precipitate when mixed?

Which of the following pairs of aqueous solutions will form a precipitate when mixed? a) Na2 SO4 + KOH b) CaS + Na2SO4 c) K2CO3 + NaCl d) None of these solution pairs will produce a precipitate. e) A
 I think the correct answer from the choices listed above is option B. The reactants calcium sulfide and sodium sulfate will react and form a precipitate which is calcium sulfate since it is only slightly soluble in aqueous solution. Hope this answers the question. ...

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