The strengths of four bases are as follows: ammonia: aniline: pyridine: diethylamine:…

CHEMISTRY · Single correct · A Level · Chemistry · Acids and bases · Acids and bases

Problem

The strengths of four bases are as follows: ammonia: Kb=1.78×10−5K_b = 1.78 \times 10^{-5} aniline: pKb=9.37pK_b = 9.37 pyridine: pKb=8.71pK_b = 8.71 diethylamine: Kb=6.9×10−4K_b = 6.9 \times 10^{-4} Deduce the order of increasing base strength. (1) aniline < pyridine < diethylamine < ammonia (2) pyridine < ammonia < diethylamine < aniline (3) diethylamine < aniline < ammonia < pyridine (4) aniline < pyridine < ammonia < diethylamine

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