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d. A sample of slag from a blast furnace is analyzed for SiO2 by decomposing a 0.5003-g sample with HCI, leaving a residue with a mass of 0.1414 g. After treating with HF and H2SO4 and evaporating the volatile SiF4, a residue with a mass of 0.0183 g remains. Determine the %w/w SiO; in the sample. e. A 100.0 mL sample of brackish water was made ammoniacal, and the sulphide it contained was titrated with 16.47 mL of 0.02310 M AgNO3. The analytical reaction is: 2Ag* + S² → Ag;S Calculate the concentration of H2S in the water in parts per million.

d. A sample of slag from a blast furnace is analyzed for SiO2 by decomposing a 0.5003-g sample with HCI, leaving a residue with a mass of 0.1414 g. After treating with HF and H2SO4 and evaporating the volatile SiF4, a residue with a mass of 0.0183 g remains. Determine the %w/w SiO; in the sample. e. A 100.0 mL sample of brackish water was made ammoniacal, and the sulphide it contained was titrated with 16.47 mL of 0.02310 M AgNO3. The analytical reaction is: 2Ag* + S² → Ag;S Calculate the concentration of H2S in the water in parts per million.

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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d. A sample of slag from a blast furnace is analyzed for SiO, by decomposing a 0.5003-g sample with HCl, leaving a residue with a mass of 0.1414 g. After treating with HF and H2SO4 and evaporating the volatile SIF4, a residue with a mass of 0.0183 g remains. Determine the %w/w SiO; in the sample. e. A 100.0 mL sample of brackish water was made ammoniacal, and the sulphide it contained was titrated with 16.47 mL of 0.02310 M A£NO3. The analytical reaction is: 2Ag* + s → Ag,S Calculate the concentration of H2S in the water in parts per million.
Transcribed Image Text:d. A sample of slag from a blast furnace is analyzed for SiO, by decomposing a 0.5003-g sample with HCl, leaving a residue with a mass of 0.1414 g. After treating with HF and H2SO4 and evaporating the volatile SIF4, a residue with a mass of 0.0183 g remains. Determine the %w/w SiO; in the sample. e. A 100.0 mL sample of brackish water was made ammoniacal, and the sulphide it contained was titrated with 16.47 mL of 0.02310 M A£NO3. The analytical reaction is: 2Ag* + s → Ag,S Calculate the concentration of H2S in the water in parts per million.
d. Ethanol and methanol are separated in a capillary GC column with retention times of 370 and 385 s, respectively, and base widths (w,) of 16.0 and 17.0 s. An unretained air peak occurs at 10.0 s. Calculate the separation factor and the resolution. e. In a GC analysis for the determination of limonene in orange peel, separate solutions of 100 ppm limonene standard and 100 ppm propanol internal standard (IS) gave peaks of 1273 and 598 respectively. A sample of the extract (50.0 mL) was spiked with 10.0 mL of 1000 ppm propanol and the mixture diluted to 100 mL. This solution gave peak areas of 723 and 519 for limonene and propanol respectively. What is the concentration of limonene in the extract?
Transcribed Image Text:d. Ethanol and methanol are separated in a capillary GC column with retention times of 370 and 385 s, respectively, and base widths (w,) of 16.0 and 17.0 s. An unretained air peak occurs at 10.0 s. Calculate the separation factor and the resolution. e. In a GC analysis for the determination of limonene in orange peel, separate solutions of 100 ppm limonene standard and 100 ppm propanol internal standard (IS) gave peaks of 1273 and 598 respectively. A sample of the extract (50.0 mL) was spiked with 10.0 mL of 1000 ppm propanol and the mixture diluted to 100 mL. This solution gave peak areas of 723 and 519 for limonene and propanol respectively. What is the concentration of limonene in the extract?
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