MolSynapsequestion bank

MolSynapse / Question bank / General Organic Chemistry II: Acids and Bases / Ortho effect and solvent effects

JEE Advanced levelOne or more correct optionsDifficulty 3 of 3g2218

Which of the following statements about solvent effects are correct?

AIn water, no acid stronger than $H X_{3} O X^{+}$ can exist
BIn water, no base stronger than $OH X^{-}$ can exist
CDMSO solvates anions strongly through hydrogen bonding
DCarboxylic acids are much weaker acids in DMSO than in water

Answer: A, B, D

Strong acids and bases are levelled in water to

H X_{3} O X^{+}

and

OH X^{-}

(A, B). DMSO is aprotic and has no hydrogen-bond donor, so it solvates anions poorly (C is wrong), and as a result carboxylic acids ionise much less in it (acetic acid pKa 4.76 in water, 12.3 in DMSO) (D).

Practice General Organic Chemistry II: Acids and Bases More on Ortho effect and solvent effects

Previous questionNext question

More questions on Ortho effect and solvent effects

Acetic acid has pKa 4.76 in water and 12.3 in DMSO. By what factor is K_a in water larger than K_a in DMSO? JEE Advanced level
Which of the following statements about alcohols are correct? JEE Advanced level
Which of the following statements are correct? JEE Advanced level
Which of the following statements about amine basicity are correct? (The conjugate-acid pKa values in water are: CH3NH3+ 10.6, NH4+ 9.25, (C... JEE Advanced level
Which of the following statements are correct? JEE Advanced level