Concept explainers
(a)
Interpretation:
The
Concept Introduction:
Henderson – Hasselbalch equation:
The
(a)

Explanation of Solution
Given that, the
By using Henderson – Hasselbalch equation, the initial
The addition of a base will react with the weak acid and thus decreases the concentration of weak acid and increases the concentration of conjugate base.
The proton transfer equilibrium is given below.
The reaction of added base with some of
The initial number of moles of acid can be calculated as shown below.
The number of moles of added base can be calculated as shown below.
The molar ratio of acid and added base in the above equation is
Now, the remaining amount of acid can be estimated.
The new concentration of conjugate base can be calculated as shown below.
Now, the
Therefore, the
(b)
Interpretation:
The
Concept Introduction:
Refer to part (a).
(b)

Explanation of Solution
Given that, the
By using Henderson – Hasselbalch equation, the initial
The addition of a strong acid will react with the conjugate base and thus decreases the concentration of conjugate base and increases the concentration of weak acid.
The proton transfer equilibrium is given below.
The reaction of added acid with some of
The initial number of moles of acid can be calculated as shown below.
The number of moles of added acid can be calculated as shown below.
The new concentration of weak acid can be calculated as shown below.
The molar ratio of conjugate base and added acid is
Now, the remaining amount of conjugate base can be estimated.
Now, the
Therefore, the
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Chapter 6 Solutions
ACHIEVE/CHEMICAL PRINCIPLES ACCESS 1TERM
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