Question

Rank the following acids in strength (from weakest to strongest). A HC H302 В НОСІ CHCN DHCI weakest = < (Enter the letter coK, for phenol (a weak acid), CH,OH is 1.00×10-10 K, for acetic acid, CH,COOH is 1.80x10-5 K, for acetylsalicylic acid (aspiri

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Answer #1

Q1) Weakest to strongest acid are

HCN < HOCl < HC2H3O2 < HCl  

HCl is a mineral acid which is strong acid. HC2H3O2 is an organic acid which is weaker than HCl.

HOCL and HCn are very weak acids.

Q2) Weakest acid has strongest conjugate base .

The larger Ka value , the stronger is the acid.

Among the given ones , the weakest acid is the one with smallest Ka value and it is C6H5OH .

Thus C6H5O- is the strongest conjugate base.

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