Multiple Choice
Which of the following compounds is insoluble in water?
2
views
6. Chemical Quantities & Aqueous Reactions
Solubility Rules
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple 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.
2:07mWatch next
Master Solubility and Insolubility with a bite sized video explanation from Jules
Start learningRelated Videos
Related Practice
Solubility Rules practice set
Problem sets built by lead tutorsExpert video explanations