Multiple Choice
Which of the following best describes a supersaturated solution?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which of the following combinations will produce a precipitate when mixed in aqueous solution?
A
NaCl(aq) + AgNO3(aq)
B
LiBr(aq) + NaCl(aq)
C
KNO3(aq) + Na2SO4(aq)
D
NH4Cl(aq) + K2SO4(aq)
Verified step by step guidance1
Identify the ions present in each solution when they dissociate in water. For example, NaCl dissociates into Na\^+ and Cl\^- ions, and AgNO3 dissociates into Ag\^+ and NO3\^- ions.
Write the possible combinations of cations and anions that can form when the two solutions are mixed. For NaCl and AgNO3, the possible new pairs are AgCl and NaNO3.
Use the solubility rules to determine if any of the possible new compounds are insoluble in water. Recall that most silver salts are insoluble except for nitrates, so AgCl is likely to precipitate.
Repeat this process for each pair of solutions: list ions, combine them, and check solubility rules to see if a precipitate forms.
Conclude which combination produces a precipitate based on the formation of an insoluble salt, such as AgCl from NaCl and AgNO3.
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