
Concept explainers
A 10.0-ml solution of 0.300 M

Interpretation:
The values of the
Concept Introduction:
Acid–base titration is a technique to analyze the unknown concentration of the acid or base through the known concentration of the acid and base.
Equivalence point is the point in the acid–base titration in the chemical reaction where the number of moles of the titrant and the unknown concentration of the analyte are equal, which is used to identify the unknown concentration of the analyte.
Answer to Problem 36QP
Solution:
(a)
(b)
(c)
(d)
(e)
Explanation of Solution
a)
Thereaction between
From the above equation, one mole of
Consider
The initial change equilibrium for the ionisation of
The equilibrium expression for the reaction is represented below.
Here,
Substitute the values of
The value of
The concentration of the hydroxide ion is calculated as follows:
The value of
Substitute the value of
The value of
Substitute the value of
Hence, the
b)
The number of moles of
Substitute the values of the concentration and the volume of
The number of moles of
Substitute the values of the concentration and the volume of
On mixing the two solutions, the molarity of the solution changes. The number of moles will remain the same.
The changes in the number of moles of
At this stage, this is a buffer solution.
Determine the pH of the buffer solution by the Henderson–Hasselbalch equation.
This is a basic buffer.
Here,
Substitute the values of
Hence, the
c)
The number of moles of
Substitute the values of the concentration and the volume of
The number of moles of
Substitute the values of the concentration and the volume of
On mixing the two solutions, the molarity of the solution changes. The number of moles will remain the same.
The changes in the number of moles of
At this stage, this is a buffer solution.
Determine the pH of the buffer solution by the Henderson–Hasselbalch equation.
This is a basic buffer.
Here,
Substitute the values of
Hence, the
d)
The number of moles of
Substitute the values of the concentration and the volume of
The number of moles of
Substitute the values of the concentration and the volume of
On mixing the two solutions, the molarity of the solution changes. The number of moles will remain the same.
The changes in the number of moles of
At this stage, an equivalence point of thetitration is reached.
Calculate the molarity of
Substitute the values of the number of moles and the volume
This is weak acid.
The ICE table for the ionization of
Let
The equilibrium expression for a reaction is written as:
Here,
Substitute the values of
The value of
Concentration of
The value of
Substitute the value of
Hence, the
e)
The number of moles of
Substitute the values of the concentration and the volume of
The number of moles of
Substitute the values of the concentration and the volume of
On mixing the two solutions, the molarity of the solution changes. The number of moles will remain the same.
The changes in the number of moles of
Calculate the molarity of
Substitute the values of the number of moles and the volume of
Concentration of
The
Substitute the value of
Hence, the
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Chapter 17 Solutions
CHEMISTRY >CUSTOM<
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