Questions: HO — C — CH2 — CH2 — C — OH
CH3 — S — CH3
CH3CH2OH
Transcript text: HO — C — CH_2 — CH_2 — C — OH
CH_3 — S — CH_3
CH_3CH_2OH
Solution
Solution Steps
Step 1: Identify the Solute
The solute given is:
HO — C — CH2—CH2—C — OH
This is a diol, specifically 1,3-propanediol, which is a polar compound due to the presence of hydroxyl (-OH) groups.
Step 2: Identify the Solvents
The two solvents provided are:
CH3—S—CH3 (dimethyl sulfide)
CH3CH2OH (ethanol)
Step 3: Determine Solvent Polarity
Dimethyl sulfide is a non-polar solvent because it lacks significant electronegative atoms that would create a dipole moment.
Ethanol is a polar solvent due to the presence of the hydroxyl (-OH) group, which can form hydrogen bonds.
Step 4: Match Solvent Polarity with Solute
Since 1,3-propanediol is a polar compound, it will dissolve better in a polar solvent. This is due to the principle "like dissolves like," where polar solutes are more soluble in polar solvents.
Final Answer
The better solvent for the solute 1,3-propanediol is ethanol (CH3CH2OH).