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Lesson 3 Quiz: Quantitative Chemical Analysis – Volumetric and Gravimetric Methods

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1.
STEM Analytical Chemistry Problem 35: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Sulfide anion (S2−) producing H2S
Thiosulfate anion producing SO2 and yellow sulfur precipitate
Carbonate anion (CO32−) producing CO2
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
2.
STEM Analytical Chemistry Problem 12: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Sulfide anion (S2−) producing H2S
Thiosulfate anion producing SO2 and yellow sulfur precipitate
Carbonate anion (CO32−) producing CO2
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
3.
STEM Analytical Chemistry Problem 32: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
Thiosulfate anion producing SO2 and yellow sulfur precipitate
Sulfide anion (S2−) producing H2S
Carbonate anion (CO32−) producing CO2
4.
STEM Chemistry Problem 21: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
25.0 mL of NaOH
10.0 mL of NaOH
12.5 mL of NaOH
50.0 mL of NaOH
5.
STEM Chemistry Problem 27: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
25.0 mL of NaOH
50.0 mL of NaOH
12.5 mL of NaOH
10.0 mL of NaOH
6.
STEM Analytical Chemistry Problem 3: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Carbonate anion (CO32−) producing CO2
Sulfide anion (S2−) producing H2S
Thiosulfate anion producing SO2 and yellow sulfur precipitate
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
7.
STEM Analytical Chemistry Problem 37: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Carbonate anion (CO32−) producing CO2
Thiosulfate anion producing SO2 and yellow sulfur precipitate
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
Sulfide anion (S2−) producing H2S
8.
STEM Chemistry Problem 42: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
12.5 mL of NaOH
10.0 mL of NaOH
50.0 mL of NaOH
25.0 mL of NaOH
9.
STEM Chemistry Problem 38: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
10.0 mL of NaOH
25.0 mL of NaOH
50.0 mL of NaOH
12.5 mL of NaOH
10.
STEM Chemistry Problem 31: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
50.0 mL of NaOH
10.0 mL of NaOH
12.5 mL of NaOH
25.0 mL of NaOH
11.
STEM Analytical Chemistry Problem 2: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Thiosulfate anion producing SO2 and yellow sulfur precipitate
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
Carbonate anion (CO32−) producing CO2
Sulfide anion (S2−) producing H2S
12.
STEM Analytical Chemistry Problem 33: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
Sulfide anion (S2−) producing H2S
Carbonate anion (CO32−) producing CO2
Thiosulfate anion producing SO2 and yellow sulfur precipitate
13.
STEM Chemistry Problem 36: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
12.5 mL of NaOH
10.0 mL of NaOH
50.0 mL of NaOH
25.0 mL of NaOH
14.
STEM Chemistry Problem 16: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
12.5 mL of NaOH
10.0 mL of NaOH
25.0 mL of NaOH
50.0 mL of NaOH
15.
STEM Chemistry Problem 37: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
25.0 mL of NaOH
12.5 mL of NaOH
50.0 mL of NaOH
10.0 mL of NaOH
16.
STEM Analytical Chemistry Problem 44: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Thiosulfate anion producing SO2 and yellow sulfur precipitate
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
Carbonate anion (CO32−) producing CO2
Sulfide anion (S2−) producing H2S
17.
STEM Chemistry Problem 4: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
25.0 mL of NaOH
12.5 mL of NaOH
10.0 mL of NaOH
50.0 mL of NaOH
18.
STEM Chemistry Problem 8: A 25.0 mL sample of 0.10 M H2SO4 is completely neutralized by 0.20 M NaOH. What volume of NaOH solution is required to reach the equivalence point?
10.0 mL of NaOH
25.0 mL of NaOH
50.0 mL of NaOH
12.5 mL of NaOH
19.
STEM Analytical Chemistry Problem 36: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Carbonate anion (CO32−) producing CO2
Thiosulfate anion producing SO2 and yellow sulfur precipitate
Sulfide anion (S2−) producing H2S
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
20.
STEM Analytical Chemistry Problem 41: When dilute hydrochloric acid (HCl) is added to a solid unknown salt, a colorless gas evolves that turns paper moistened with acidified potassium dichromate from orange to green. What is the anion?
Sulfide anion (S2−) producing H2S
Carbonate anion (CO32−) producing CO2
Sulfite anion (SO32−) producing sulfur dioxide gas (SO2)
Thiosulfate anion producing SO2 and yellow sulfur precipitate
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