Concept explainers
When ethylamine, a weak base
Interpretation:
The K of the given reaction is to be calculated.
Concept introduction:
The relationship between the concentration of products and reactants at equilibrium for a general reaction:
Where A, B, C, and D represents chemical species and a, b, c, and d are the coefficients for balanced reaction.
The equilibrium expression, Kc for reversible reaction is determined by multiplying the concentrations of products together and divided by the concentrations of the reactants. Every concentration term is raised to the power that is equal to the coefficient in the balanced reaction. So, the expression is:
pH scale is a type of measurement of H+ ion concentration in the solution. It is taken as a negative log of H+ ion concentration as:
For the equilibrium conditions:
Where, ka is acid dissociation constant, kb is base dissociation constant and kw is ionic product of water whose value is fixed as 10-14.
Answer to Problem 27QAP
The required value of
Explanation of Solution
Given Information:
The weak base ethylamine
The reaction is:
The ethylamine dissociates as;
The equilibrium constant expression will be:
Further the formic acid dissociates as:
Hence, we have:
The equilibrium constant expression will be:
Now both the reactions are combined as:
The equilibrium constant expression will be:
The expression can be rearranged as:
Putting the values we get:
The required value of
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Chapter 22 Solutions
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