객관식
Which of the following reactions is an example of a precipitation reaction according to solubility rules?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
객관식
Based on general solubility rules, which of the following salts would dissolve most completely in water at room temperature, and what would the solution look like after dissolution?
A
NaCl; the solution would be clear with no visible solid remaining.
B
CaCO3; the solution would be cloudy with undissolved solid present.
C
AgCl; the solution would be cloudy with undissolved solid present.
D
PbSO4; the solution would be cloudy with undissolved solid present.
검증된 단계별 안내1
Recall the general solubility rules for ionic compounds in water: most alkali metal salts (like Na+) and nitrates are soluble, while many salts containing carbonate (CO\_3^{2-}), chloride (Cl^-), sulfate (SO\_4^{2-}), and other anions may be insoluble or sparingly soluble depending on the cation.
Identify the cations and anions in each salt: NaCl (sodium chloride), CaCO\_3 (calcium carbonate), AgCl (silver chloride), and PbSO\_4 (lead sulfate).
Apply the solubility rules: NaCl is generally very soluble in water because sodium salts are soluble; CaCO\_3, AgCl, and PbSO\_4 are known to be sparingly soluble or insoluble, meaning they do not dissolve completely and leave some solid undissolved.
Predict the appearance of the solution after dissolution: a completely dissolved salt like NaCl will produce a clear solution with no visible solid, while sparingly soluble salts like CaCO\_3, AgCl, and PbSO\_4 will result in a cloudy solution due to undissolved solid particles.
Conclude that NaCl dissolves most completely in water at room temperature, resulting in a clear solution, whereas the other salts remain partially undissolved and cause cloudiness.
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