#1
Which indicator is commonly used in acid-base titrations?
Phenolphthalein
ExplanationPhenolphthalein changes color at the equivalence point.
#2
What is the pH of a neutral solution?
7
ExplanationThe pH of a neutral solution is 7.
#3
What is the equivalent point in an acid-base titration?
When the amount of acid equals the amount of base added
ExplanationEquivalent point: acid = base added.
#4
What is the significance of the stoichiometric point in a titration?
It signifies the completion of the reaction
ExplanationStoichiometric point = reaction completion.
#5
What is the primary function of a buffer solution?
To resist changes in pH
ExplanationBuffers resist pH changes.
#6
What is the formula for calculating the pH of a solution?
pH = -log[H+]
ExplanationpH = -log[H+] for solution acidity.
#7
What is the role of an indicator in an acid-base titration?
To change color at the equivalence point
ExplanationIndicator changes color at equivalence.
#8
Which of the following is true about a titration of a weak acid with a strong base?
The pH at the equivalence point is basic
ExplanationWeak acid-strong base = basic pH at equiv.
#9
What happens to the pH at the equivalence point in a strong acid-strong base titration?
It remains the same
ExplanationpH remains constant at equivalence point.
#10
In a titration curve, what does the vertical region represent?
The equivalence point
ExplanationVertical region = equivalence point.
#11
What type of titration curve is obtained when a strong acid is titrated with a weak base?
A gradual curve
ExplanationStrong acid-weak base = gradual curve.
#12
How does the pH change during the titration of a weak acid with a strong base?
pH increases initially, then decreases
ExplanationpH: ↑ then ↓ in weak acid-strong base.
#13
What is the relationship between the volume of titrant added and the pH in a titration?
Exponential
ExplanationVolume of titrant vs. pH is exponential.
#14
What is the significance of the half-equivalence point in a titration curve?
It represents the point where half of the titrant has reacted
ExplanationHalf-equiv. = half of titrant reacted.