Given pK_a(HC#CH) = 25 and pK_a(C2H5OH) = 15.9, the value of log_10K for HC#CH + C2H5O- HC#C- + C2H5OH is

JEE Main levelSingle correct optionDifficulty 2 of 3g2120

Given $p K_{a} (HC \equiv CH) = 25$ and $p K_{a} (C X_{2} H X_{5} OH) = 15.9$ , the value of $lo g_{10} K$ for $HC \equiv CH + C X_{2} H X_{5} O X^{-} HC \equiv C X^{-} + C X_{2} H X_{5} OH$ is

lo g K = 15.9 - 25 = - 9.1

, so

K \approx 1 0^{- 9}

. Sodium ethoxide cannot generate the acetylide appreciably, and a much stronger base (

NH X_{2} X^{-}

) is needed.

Using pK_a(CH3COOH) = 4.76 and pK_a(H2O) = 15.7, the value of log_10K for CH3COOH + OH- <=> CH3COO- + H2O is closest to JEE Main level
Given pK_a(C6H5OH) = 10.0 and pK_a(C2H5OH) = 15.9, what is log_10K for C6H5OH + C2H5O- <=> C6H5O- + C2H5OH? JEE Main level
An ether solution contains benzoic acid, phenol and toluene. It is shaken with dilute aqueous NaHCO3 (pK_a of H2CO3 is 6.4; benzoic acid 4.2... JEE Main level
Which base converts a simple ketone such as acetone (pK_a approx 19.3 in water) almost completely into its enolate? JEE Main level
Methylmagnesium bromide, CH3MgBr, evolves methane by acid-base reaction (ignore any addition reactions) with which of the following? JEE Main level
Take pK_a(H2CO3) = 6.4. Which of the following acids liberate CO2 from aqueous NaHCO3? (pK_a values: 2,4,6-trinitrophenol 0.4; 2-nitrobenzoi... JEE Main level