Question

Using the Base Dissociation Constants table, order the following bases from strongest to weakest. (Use the appropriate <, =, or > symbol to separate substances in the list.)

H₂O,    CH₃NH₂,    ClO₄⁻,    and    H₂NNH₂

Answer 1

ClO_{​​​​4} ^- < H_{​​​​​​2}O < NH2NH2 < CH​_{​​​​​3}​​​​ NH_{​​​​​2 .}

In methyl amine, the +I effect of methyl group increases the electron density on N atom so that the lone pair of electrons on N atom can be easily donated to an acid. Hence, methylamine is more basic .

Arrhenius base, hydrazine is a weaker base because the more electronegative group NH2 has the - I effect on the lone pair of electron of the neighbouring nitrogen, making it lessbasic for protonation.

water is a very  weak acid (or base).amphoteric nature .

Perchloric acid (HCLO4) is even more stronger thanHydrochloric acid (HCL). Hence it's conjugate base (ClO4 ^-- ) is a weakest base.