Acids and Bases (AP Chem)

Quiz
•
Chemistry
•
11th - 12th Grade
•
Medium
Standards-aligned
Caroline Duesing
Used 321+ times
FREE Resource
15 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
15 mins • 1 pt
A buffer solution is prepared by mixing equal volumes of 0.50 M weak acid with 1.0 M of its conjugate base. Based on the data given in the table above, which of the following pairs of chemical solutions should be used to prepare the buffer solution so that the pH will be between 4 and 7?
CH3COOH and NH3
CH3COOH and CH3COONa
H2CO3 and NH3
H2CO3 and Na2CO3
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Ascorbic acid, H2C6H6O6(s), is a diprotic acid with K1 = 7.9 × 10–5 and K2 = 1.6 × 10–12. In a 0.005 M aqueous solution of ascorbic acid, which of the following species is present in the lowest concentration?
H3O+(aq)
H2C6H6O6(aq)
HC6H6O6-(aq)
C6H6O62-(aq)
Tags
NGSS.HS-PS1-7
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
In the titration of a weak acid of unknown concentration with a standard solution of a strong base, a pH meter was used to follow the progress of the titration. Which of the following is true for this experiment?
The [H+] at the equivalence point equals the ionization constant of the acid.
The pH at the equivalence point depends on the indicator used.
The graph of pH versus volume of base added rises gradually at first and then much more rapidly.
The graph of pH versus volume of base added shows no sharp rise.
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following is the correct equilibrium expression for the hydrolysis of CO3 2– ?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Which of the following best approximates the Ka value for this weak acid?
1 x 10–3
1 x 10–4
1 x 10–5
1 x 10–6
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Which point on the titration curve corresponds to the point at which the moles of the added strong base are equal to the moles of the weak acid initially present?
Q
R
S
T
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
At point P in the titration, which of the following species has the highest concentration?
HA
A–
H3O+
OH–
Tags
NGSS.HS-PS1-3
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