Consider the following species at 25 °C

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

Problem

Consider the following species at 25 °C. HOBr (pKa=8.65pK_a = 8.65) HCN (pKa=9.21pK_a = 9.21) (CH3_3)2_2NH (pKb=3.27pK_b = 3.27) CH3_3ONH2_2 (pKb=4.75pK_b = 4.75) Which option lists the species in order of increasing basicity (strongest acid first, strongest base last)? (a) HCN, HOBr, CH3_3ONH2_2, (CH3_3)2_2NH (b) HOBr, HCN, CH3_3ONH2_2, (CH3_3)2_2NH (c) (CH3_3)2_2NH, HCN, CH3_3ONH2_2, HOBr (d) HOBr, CH3_3ONH2_2, HCN, (CH3_3)2_2NH

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