Multiple Choice
Which of the following compounds is insoluble in water?
63
views
6. Chemical Quantities & Aqueous Reactions
Solubility Rules
Multiple Choice
When aqueous solutions of Na2SO4 and BaCl2 are mixed, which product in the reaction forms a precipitate?
A
BaSO4
B
Na2SO4
C
BaCl2
D
NaCl
Verified step by step guidance1
Identify the ions present in the solutions before mixing: Na2SO4 dissociates into 2 Na\(\textsuperscript{+}\) ions and SO4\(\textsuperscript{2-}\) ion, while BaCl2 dissociates into Ba\(\textsuperscript{2+}\) ion and 2 Cl\(\textsuperscript{-}\) ions.
Write the possible combinations of ions that can form products when the solutions are mixed: Na\(\textsuperscript{+}\) with Cl\(\textsuperscript{-}\) forming NaCl, and Ba\(\textsuperscript{2+}\) with SO4\(\textsuperscript{2-}\) forming BaSO4.
Recall the solubility rules: most sodium salts (like NaCl) are soluble in water, and most chloride salts (like BaCl2) are soluble, but barium sulfate (BaSO4) is known to be insoluble and forms a precipitate.
Conclude that the product BaSO4 will form a solid precipitate because it is insoluble, while NaCl remains dissolved in the aqueous solution.
Therefore, the precipitate formed in the reaction is BaSO4.
Related Videos
Related Practice
