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Acids and Bases Review Questions

Navigation   » List of Schools  »  East Los Angeles College  »  Chemistry  »  Chemistry 51 – Fundamentals of Chemistry  »  Fall 2021  »  Acids and Bases Review Questions

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Below are the questions for the exam with the choices of answers:

Question #1
The name of Al(OH)3 is
A  aluminum oxygen hydride.
B  aluminum hydroxide.
C  aluminum trihydroxide.
D  aluminum(III) hydroxide.
E  monoaluminum trihydroxide.
Question #2
Which solution has the highest pH?
A  a buffer made with 0.01 M acetic acid and 0.01 M sodium acetate
B  a buffer made with 0.01 M acetic acid and 0.10 M sodium acetate
C  a buffer made with 0.10 M acetic acid and 0.01 M sodium acetate
D  a buffer made with 0.10 M acetic acid and 0.10 M sodium acetate
E  All of the buffers have the same pH since they are all made with acetic acid and sodium acetate.
Question #3
Which of the following is a buffer system?
A  H2CO3 and KHCO3
B  NaCl and NaNO3
C  H2O and HCl
D  NaCl and NaOH
E  HCl and NaOH
Question #4
In a buffer system of HF and its salt, NaF,
A  the F- neutralizes added H2O.
B  the F- neutralizes added base.
C  the HF neutralizes added acid.
D  the HF neutralizes added base.
E  the HF is not necessary.
Question #5
Which one of the following is characteristic of a base?
A  has a sour taste
B  has a slippery, soapy feel
C  is insoluble in water
D  turns blue litmus red
E  produces H3O+ in water
Question #6
The function of a buffer is to
A  act as a strong acid.
B  change color at the end point of a titration
C  maintain a neutral pH.
D  be a strong base.
E  maintain the pH of a solution.
Question #7
For the problem(s) that follow, consider the reaction in which magnesium reacts with an HCl solution.
Mg(s) + 2HCl(aq) → MgCl2(aq) + H2(g)
If 2.00 g of Mg reacts completely with 50.0 mL of HCl solution, what is the molarity of the HCl solution?
A  8.00 M
B  0.823 M
C  3.29 M
D  1.65 M
E  80.0 M
Question #8
How many milliliters of 0.200 M NaOH are required to completely neutralize 5.00 mL of 0.100 M H3PO4?
A  7.50 mL
B  0.833 mL
C  5.00 mL
D  15.0 mL
E  2.50 mL
Question #9
A 25.0 mL sample of H2SO4 requires 20.0 mL of 2.00 M KOH for complete neutralization. What is the molarity of the acid? H2SO4 + 2KOH → K2SO4 + 2H2O
A  1.25 M
B  0.800 M
C  2.00 M
D    
E  1.60 M
F  2.50 M
Question #10
In a neutralization reaction, how many moles of HClO4 react with 1 mole of Al(OH)3?
A  2
B  5
C    
D  1
E  4
F  3
Question #11
Which of the following is the correctly balanced equation for the complete neutralization of H3PO4 with Ca(OH)2?
A  2H3PO4 + 3Ca(OH)2 → Ca3(PO4)2 + 6H2O
B  H3PO4 + Ca(OH)2 → Ca3(PO4)2+ H2O
C  4H3PO4 + 6Ca(OH)2 → 2Ca3(PO4)2 + 12H2O
D  3H3PO4 + Ca(OH)2 → Ca3(PO4)2 + 5H2O
E  H3PO4 + Ca(OH)2 → CaHPO4 + 2H2O
Question #12
The [ H3O+] of a solution with pH = 2 is
A  -10 M.
B  1 × 10-12 M.
C  1 × 10-2 M.
D  10 M.
E  1 × 102 M.
Question #13
What is the pH of a solution with [ H3O+] = 1 × 10-9 M?
A  1.0 × 10-5 M
B  5.0
C  9.0
D  -5.0
E  -9.0
F    
Question #14
The name given to an aqueous solution of HBr is
A  hydrogen bromide.
B  bromic acid.
C  bromous acid.
D  hypobromous acid.
E  hydrobromic acid.
Question #15
What is the [OH-] in a solution that has a [ H3O+] = 2.0 × 10-4 M?
A  5.0 × 10-10 M
B  5.0 × 10-11 M
C  1.0 × 10-10 M
D  2.0 × 10-4 M
E  2.0 × 10-10 M
Question #16
Which of the following statements correctly describes the hydronium-hydroxide balance in the given solution?
A  In neutral solutions, [ H3O+] = [ H2O].
B  In acids, [OH-] is greater than [ H3O+].
C  In bases, [OH-] is less than [ H3O+].
D  In bases, [OH-] is greater than [ H3O+].
E  In bases, [OH-] = [ H3O+].
Question #17
The Ka for hydrofluoric acid is 7.2 × 10-4. This means that HF is
A  neutral in water solution.
B  able to react with HCl.
C  a weak acid.
D  ionic.
E  a strong acid.
Question #18
Which of the following is the weakest acid?
A  HCN ( Ka for HCN is 4.9 × 10-10)
B  H3BO3 ( Ka for H3BO3 is 5.4 × 10-10)
C  HCNO ( Ka for HCNO is 2 × 10-4)
D  HF ( Ka for HF is 7.2 × 10-4)
Question #19
Which of the following is correctly identified?
A  NaOH, strong base
B  NH3, strong acid
C  HCl, weak acid
D  H2CO3, strong acid
E  Ca(OH)2, weak base
Question #20
The conjugate base of HClO3 is
A  ClO3-.
B  Cl(OH)2.
C  ClO3.
D  HClO.
E  HClO2.
Question #21
Identify the Brønsted-Lowry acids in the following reaction.
H2O + CO32- → HCO3- + OH-
A  H2CO3/H2O
B  CO32-/HCO3-
C  CO32-/OH-
D  OH-/HCO3-
E  H2O/HCO3-
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