Question Detail

CHM 102 Alkynes: Structure, Bonding, and Nomenclature Objective Question
Take CBT

Question

What is the pKa of water compared to a terminal alkyne?
Options
A Water is less acidic (higher pKa)
B Water is more acidic (lower pKa)
Correct Answer
C They have the same pKa
D Cannot compare
Correct Answer

Option B is the correct answer.

Detailed Explanation

Water has pKa ≈ 15.7, while a terminal alkyne has pKa ≈ 25. Water is a stronger acid; thus, NaOH cannot deprotonate a terminal alkyne.

Hint

Lower pKa = stronger acid.

Question Info

Course: CHM 102
Topic: Alkynes: Structure, Bonding, and Nomenclature
Type: Objective
Difficulty: Not specified
Question 223 of 1999
Previous Course Details Next