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WorksheetsQUIZBEE - Chapter 13
Total questions: 11
Worksheet time: 27mins
A 4.912-g sample of a petroleum product was burned in a tube furnace, and the SO2 produced was collected in 3% H2O2. Reaction: SO2(g) + H2O2 -> H2SO4
A 20.00-mL portion of 0.00873 M NaOH was introduced into the solution of H2SO4, following which the excess base was back-titrated with 15.17 mL of 0.01102 M HCl. Calculate the sulfur concentration in the sample in parts per million.
176.7 ppm S
166.7 ppm S
24.25 ppm S
24.52 ppm S
What do you call a compound whose purity has been determined
by chemical analysis? It serves as the working standard material for titrations and for many other analyses.
Primary standard
Secondary standard
Ideal standard
Indicator
A solution of HClO4 was standardized by dissolving 0.4008 g of primary-standard-grade HgO in a solution of KBr: HgO(s) + 4Br- + H2O -> HgBr42- + 2OH2
The liberated OH2 consumed 33.75 mL of the acid. Calculate the molar concentration of the HClO4.
0.08549 M HClO4
0.10965 M HClO4
0.08459 M HClO4
0.10695 M HClO4
What do you call this a process in which the excess of a standard solution used to consume an analyte is determined by titration with a second standard solution?
Titration
Back Titration
Equivalence Point
Standard Solution
What mass of solute in grams is contained in 2.50 L of a solution that contains 23.4 ppm
SnCl2?
0.0558 g
0.0855 g
0.0585 g
0.00558 g
What do you call the point in a titration when a physical change occurs that is associated with the condition of chemical equivalence?
Focal Point
Equivalence Point
End Point
Game Point
A 0.5002-g sample that assayed 96.4% Na2SO4 required 48.63 mL of a barium chloride solution. Reaction: Ba2+ + SO42+ -> BaSO4(s)
Calculate the analytical molar concentration of BaCl2 in the solution.
0.0688 M
0.0698 M
0.0878 M
0.0887 M
The volume of a standard reagent is the measured quantity. What do you call this?
coulometric titrations
gravimetric titrations
redox titrations
volumetric titrations
What is the molar concentration of a solution that is 50.0% NaOH (w/w) and has a specific gravity of 1.52.
18.0 M
19.0 M
20.0 M
21.0 M
Describe the preparation of 1.50 L of a solution that is 12.0 ppm in K+, starting with solid K4Fe(CN)6.
Dissolve 24.2. mg K4Fe(CN)6 in water and dilute to 1.50 L.
Dissolve 44.2 mg K4Fe(CN)6 in water and dilute to 1.50 L.
Dissolve 42.4 mg K4Fe(CN)6 in water and dilute to 1.50 L.
Dissolve 22.4 mg K4Fe(CN)6 in water and dilute to 1.50 L.
0.4723-g sample of primary-standard-grade Na2CO3 required 34.78 mL of an H2SO4 solution to reach the end point in the reaction CO32- + 2H+ -> H2O + CO2(g) What is the molar concentration of the H2SO4?
0.1218M
0.1128 M
0.1821 M
0.1281 M
