Multiple Choice
Which of the following compounds is NOT soluble in water at room temperature?
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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 CH3OH (methanol)?
A
FeS
B
NaCl
C
CaCO3
D
C6H12O6 (glucose)
Verified step by step guidance1
Step 1: Understand the principle 'like dissolves like,' which means polar solvents tend to dissolve polar substances, and nonpolar solvents dissolve nonpolar substances.
Step 2: Recognize that methanol (CH3OH) is a polar solvent because it has a polar O-H bond and can form hydrogen bonds.
Step 3: Analyze the substances given: FeS, NaCl, and CaCO3 are ionic compounds, which generally dissolve well in polar solvents but often require water due to their strong ionic lattice and hydration energy.
Step 4: Consider C6H12O6 (glucose), which is a polar molecule with multiple hydroxyl (-OH) groups capable of hydrogen bonding with methanol, making it highly soluble in methanol.
Step 5: Conclude that glucose is most likely to dissolve in methanol because of its polarity and ability to form hydrogen bonds, unlike the ionic solids listed.
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