1.000 g of a weak base is titrated with 1.000 M aqueous HCl to give the data sho

Question

1.000 g of a weak base is titrated with 1.000 M aqueous HCl to give the data shown. What is the identity of the base?

(A) Ammonia, NH3 (pKa of NH4 + = 9.3)

(B) Aniline, C6H5NH2 (pKa of C6H5NH3 + = 4.6)

(C) Hydroxylamine, NH2OH (pKa of NH3OH+ = 6.0)

(D) Trimethylamine, (CH3)3N (pKa of (CH3)3NH+ = 9.8)

https://www.acs.org/content/dam/acsorg/education/students/highschool/olympiad/pastexams/2017-local-olympiad-exam.pdf

This is the link to the practice exam for the picture its question 34 (answer key at bottom answer A correct)

Please write out how you got answer!! Thanks!

Explanation / Answer

Hence the weak base is ammonia

Correct option is (A) Ammonia

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