
Concept explainers
(a)
Interpretation: The number of moles of
Concept Introduction: pH of a solution indicates the concentration of
Similarly the pOH value is related to the concentration of OH- ions as given:
(a)

Answer to Problem 8E
Explanation of Solution
Concentration of HCl=[
Volume = 15 mL
Calculate moles of HCl:
(b)
Interpretation: The concentration of solution after addition of 25 mL of water in 15 mL of 0.025 M HCl solution needs to be determined.
Concept Introduction: pH of a solution indicates the concentration of
Similarly the pOH value is related concentration of OH- ions as given:
(b)

Answer to Problem 8E
Explanation of Solution
[
Volume = 15 mL
M1 = 0.025 M
V1 = 15 mL
M2 = need to calculate
V2 = 15 + 25 = 40 mL
Calculate the new concentration:
(c)
Interpretation: The final pH of the solution after addition of 25 mL of water in 15 mL of 0.025 M HCl solution.
Concept Introduction: pH of a solution indicates the concentration of
Similarly the pOH value is related concentration of OH- ions as given:
(c)

Answer to Problem 8E
Explanation of Solution
[
Volume = 15 mL
M1 = 0.025 M
V1 = 15 mL
M2 = need to calculate
V2 = 15 + 25 = 40 mL
Calculate the new concentration:
This is equal to the concentration of hydrogen ion.
Calculate pH:
Chapter U4 Solutions
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