Which of the following products do not form in the following reaction?

Question

Quizplus · Accepted Answer

The reaction is a double displacement or metathesis reaction, where the anions and cations of the reactants switch places. The products of the reaction are: 
I. BaSO4 - barium sulfate 
II. NaCl - sodium chloride 
III. AgNO3 - silver nitrate 
IV. K2SO4 - potassium sulfate 
Barium sulfate and sodium chloride are both soluble in water, so they will form as products. However, silver nitrate will react with sodium sulfate (produced from the reaction of NaCl and K2SO4) to form silver sulfate and sodium nitrate, which are both soluble in water, hence not forming a product. Therefore, the correct answer is C, only III and IV do not form as products.

Which of the Following Products Do Not Form in the Following