Solubility of carboxylic acids decreases in water with increase in molar mass because:
Correct answer: B. bigger molecules have bigger non-polar groups
- A. Bigger molecules are more polar
- B. bigger molecules have bigger non-polar groups
- C. bigger molecules make more hydrogen bonds
- D. bigger molecules can form lesser hydrogen bonds/molecule
Explanation
The correct explanation for the decrease in solubility of carboxylic acids in water with an increase in molar mass is that the bigger molecules have bigger non-polar groups. As the molar mass increases, carboxylic acids tend to have larger hydrocarbon (non-polar) groups, which reduces their overall polarity and makes them less soluble in water.
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About Carboxylic Acids
Carboxylic acids are named and studied through the combined effects of the carbonyl and hydroxyl groups, their preparation, acidity and hydrogen bonding. Reactions include neutralisation, esterification, reduction and conversion into acid chlorides, anhydrides, esters and amides, with emphasis on how these derivatives interconvert.
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