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