Is the pH at the equivalence point always equal to 7? Explain your answer based on...
Is the pH at the equivalence point always equal to 7? Explain your answer based on your experimental observations. Include a discussion of equivalence point pH values for strong versus weak acids.
What factors determine if neutralization occurs during an acid-base reaction?
Homework Answers
No, not always the pH at the equivalence point equals 7.
This occurs only in the neutralization of an acid and a strong base.
In the case of a weak acid and strong base, the pH at the equivalence point is displaced towards the base (greater than 7). In the case of a strong acid and a weak base, the pH moves towards the acid (lower to 7).
The presence of H + and OH- ions dissociated from the respective acids and bases, are the basis of neutralization (acid-base titration), other factors such as temperature, presence of other ions, concentration of neutralizing ions, also affect.
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Is the pH at the equivalence point always equal to 7? Explain your answer based on...
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Equivalence Point for Titration #1: 24.96 mL Equivalence Point for Titration #2: 25.40 mL Equivalence Point...
Equivalence Point for Titration #1: 24.96
mL
Equivalence Point for Titration #2: 25.40
mL
Equivalence Point for Titration #3: 25.20
mL
Midpoint pH for Titration #3: 9.80
QUESTIONS:
4) Set up the calculation required to determine
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amount of KHP. Include all numbers except the given mass of
KHP.
5) Set up the calculation required to determine
the concentration of the unknown strong acid via titration with a
known volume...
Predict where the pH will lie at the equivalence point for thefollowing titrations a. Strong...
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7) derive the relationship between pH and pKa at one-half the
equivalence point for the titration of a weak acid with a strong
base
358 Report Sheet Titration Curves of Polyprotie Acids 7. Derive the relationship between pH and at one-half the equivalence point for the titration of a weak pKa acid with a strong base. 8. Could Ks for a weak base be determined the same way that Ka for a weak acid is determined in this experiment? 9....
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Equivalence Point for Titration #1: 24.96
mL
Equivalence Point for Titration #2: 25.40
mL
Equivalence Point for Titration #3: 25.20
mL
Midpoint pH for Titration #3: 9.80
QUESTIONS:
4) Set up the calculation required to determine
the concentration of the NaOH solution via titration of a given
amount of KHP. Include all numbers except the given mass of
KHP.
5) Set up the calculation required to determine
the concentration of the unknown strong acid via titration with a
known volume...
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