Account for the following: Carboxylic acids with five or less carbons are water soluble, but many with six or more carbons dissolves in alcohols.
RCOOH dissolves in water because COOH of RCOOH can H-bond with water in two ways.
The R group is non-polar and hydrophobic and this effect dominates when R possess more than five carbon. Thereby, decreasing its solubility in more polar solvent as water, but the solubility in less polar solvent such as alcohol increases.
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323.
Account for the following: Carboxylic acids exist as dimers in the vapour phase.
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324.Illustrate the mechanism of reaction of carbonyl group with an ammonia derivative, H2N—Z.
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325.Account for the fact that the C—O bond in RCOOH is shorter than in ROH ?
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326.Compare the reactivities of the C = O in RCOOH and RCHO towards nucleophiles.
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327.Why is benzoic acid a stronger acid than phenol?
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328.Write equation for the ionization of RCOOH and for Ka and then explain why RCOOH has a lower pKa value than alcohol.
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329.Account for the following acidic strength order:
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330.Account for the following acidic strength order:
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