Chemistry & Chemical Reactivity
Solutions
Chemistry & Chemical Reactivity
A solution prepared from 0.055 mol of butanoic acid and sufficient water to give 1.0 L of solution has a pH of 2.72. Determine Ka for butanoic acid. The acid ionizes according to the balanced equation
CH3CH2CH2CO2H(aq) + H2O(l)
Interpretation:
The value of
Concept introduction:
The
The acid dissociation constant
For an aqueous solution the general form of an acid dissociation equilibrium reaction is written as;
Given:
Concentration of butanoic acid is
The balanced equation of butanoic acid is given below.
Expression for acid dissociation constant is written as,
Concentration of
Therefore concentration of hydronium ion is
On substituting those values in ICE table (1).
Chapter 16 Solutions
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