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Write the K a expression for an aqueous solution of acetic acid : (Note that eit

ID: 1020301 • Letter: W

Question

Write the Ka expression for an aqueous solution of acetic acid:

(Note that either the numerator or denominator may contain more than one chemical species. Enter the complete numerator in the top box and the complete denominator in the bottom box. Remember to write the hydronium ion out as , and not as )

Ka   

Write the Ka expression for an aqueous solution of hydrofluoric acid:

(Note that either the numerator or denominator may contain more than one chemical species. Enter the complete numerator in the top box and the complete denominator in the bottom box. Remember to write the hydronium ion out as , and not as )

Ka   

Explanation / Answer

CH3COOH +H2O <=> CH3COO- +H3O+

Ka is the dissociation constant of acetic acid:


Ka= [CH3COO-]*[H3O+]/[CH3COOH]

HF +H2O <=> F- +H3O+

Ka is the dissociation constant of hydrofluoric acid:


Ka= [F-]*[H3O+]/[HF]