Multiple Choice
Which of the following compounds is soluble in water at 25 b0C?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which of the following substances is most likely to dissolve in hexane?
A
KNO_3 (potassium nitrate)
B
NaCl (sodium chloride)
C
CCl_4 (carbon tetrachloride)
D
CH_3OH (methanol)
Verified step by step guidance1
Identify the nature of hexane: hexane is a nonpolar solvent, meaning it dissolves substances that are also nonpolar or have nonpolar characteristics.
Recall the principle 'like dissolves like,' which means polar solvents dissolve polar substances, and nonpolar solvents dissolve nonpolar substances.
Examine each substance's polarity: KNO_3 and NaCl are ionic compounds and highly polar, CH_3OH (methanol) is a polar molecule due to its -OH group, and CCl_4 (carbon tetrachloride) is a nonpolar molecule because of its symmetrical tetrahedral shape and nonpolar C-Cl bonds.
Compare the polarity of each substance to hexane: since hexane is nonpolar, it will most likely dissolve the nonpolar substance, which is CCl_4.
Conclude that CCl_4 is the most likely to dissolve in hexane because both are nonpolar, following the 'like dissolves like' rule.
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