Hcl is a stronger acid than the ammonium ion (nh4+). which one of the following is true?

a) equilibrium constant for hydrolysis of hcl is smaller than that for nh4+
b) cl- is a weaker base than nh3
c) solutions of hcl will always have more hydrogen ions than solutions of nh3
d) ph of 0.1moll-1 solution of hcl will be greater than the ph of a 0.1 moll-1 solution of nh3

the answer is b, but could someone explain it to me? i though cl- was neutral, not basic?

The chloride ion is a weak conjugate base of a strong acid that is hydrochloric acid.

Explanation:

Weak conjugate bases are produced from strong acids, and strong conjugate bases are produced from weak acids.  Here hydrochloric acid is a strong acid, and when dissolved into water, it completely ionizes into H+ and Cl- ions.

Ammonia is the conjugate acid of NH2-ion which is a  strong base and becomes more stable by accepting a proton. Therefore, Cl- is an ionic species and also a conjugate base of a very strong acid.

he would use the colour black

the answer is:  

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