Order the following compounds with respect to #pK_a#: #"chloroacetic acid;"# #"ammonium ion; water; dimethylammonium ion"#?

1 Answer
anor277
Sep 25, 2017

From least #pK_a# to greatest #pK_a#......

Explanation:

#ClCH_2CO_2H#, #pK_a=2.85#

#H_3C-CO_2H#, #pK_a=4.76#

#H_4N^+#, #pK_a=9.25# (Note that #NH_2^(-)# is not present in aqueous solution.)

#H_3C-stackrel(+)NH_2CH_3#, #pK_a=10.73#

#H_2O#, #pK_a=14.0#

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