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. Another method for visualizing the spots is to use H2S gas to react with the metal ions to form metal sulfides. H₂S is a toxic gas. Toxicity data are often reported in terms of the LD50, which is the concentration of a substance that causes death in 50% of the population. The LD50 for H₂S (g) is 673 parts per million (ppm) for rats and 713 ppm for mice. For a gas, parts per million are calculated in terms of volume as shown below: parts per million: = volume of gas total volume of sample X 106 Example: If 18.6 L of gas are dispersed in a room with a total volume of 2.0 × 105 L, calculate the concentration of the gas in parts per million. parts per million = 18.6 L gas 2.0 × 105 L × 106 = 93 ppm a. In a slightly different paper chromatography experiment as described above, the safety conscious will always do a "worst case scenario" calculation to see if the H,S (g) could reach a lethal concentration. Assume the room has a total volume of 198,200 L and there are six 1.5 L H₂S (g) generators releasing all of the gas they can into the room at one time. Would the H2S (g) concentration exceed the LD50 for rats? Explain. b. OSHA warns that for H₂S (g) concentrations of 600 ppm, breathing can be inhib- ited as the lungs fill with the gas. Assume that the six H2S (g) generators continually release all of the gas they can every 15 minutes, and the gas is never vented out of a room with a volume of 198,200 L. How long will it take for the H,S (g) concentration to reach dangerous levels? Explain.

. Another method for visualizing the spots is to use H2S gas to react with the metal ions to form metal sulfides. H₂S is a toxic gas. Toxicity data are often reported in terms of the LD50, which is the concentration of a substance that causes death in 50% of the population. The LD50 for H₂S (g) is 673 parts per million (ppm) for rats and 713 ppm for mice. For a gas, parts per million are calculated in terms of volume as shown below: parts per million: = volume of gas total volume of sample X 106 Example: If 18.6 L of gas are dispersed in a room with a total volume of 2.0 × 105 L, calculate the concentration of the gas in parts per million. parts per million = 18.6 L gas 2.0 × 105 L × 106 = 93 ppm a. In a slightly different paper chromatography experiment as described above, the safety conscious will always do a "worst case scenario" calculation to see if the H,S (g) could reach a lethal concentration. Assume the room has a total volume of 198,200 L and there are six 1.5 L H₂S (g) generators releasing all of the gas they can into the room at one time. Would the H2S (g) concentration exceed the LD50 for rats? Explain. b. OSHA warns that for H₂S (g) concentrations of 600 ppm, breathing can be inhib- ited as the lungs fill with the gas. Assume that the six H2S (g) generators continually release all of the gas they can every 15 minutes, and the gas is never vented out of a room with a volume of 198,200 L. How long will it take for the H,S (g) concentration to reach dangerous levels? Explain.

Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter19: The Representative Elements
Section: Chapter Questions
Problem 104CP
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I am needing help with parts a and b please 

. Another method for visualizing the spots is to use H2S gas to react with the metal ions to form metal sulfides. H₂S is a toxic gas. Toxicity data are often reported in terms of the LD50, which is the concentration of a substance that causes death in 50% of the population. The LD50 for H₂S (g) is 673 parts per million (ppm) for rats and 713 ppm for mice. For a gas, parts per million are calculated in terms of volume as shown below: parts per million: = volume of gas total volume of sample X 106 Example: If 18.6 L of gas are dispersed in a room with a total volume of 2.0 × 105 L, calculate the concentration of the gas in parts per million. parts per million = 18.6 L gas 2.0 × 105 L × 106 = 93 ppm a. In a slightly different paper chromatography experiment as described above, the safety conscious will always do a "worst case scenario" calculation to see if the H,S (g) could reach a lethal concentration. Assume the room has a total volume of 198,200 L and there are six 1.5 L H₂S (g) generators releasing all of the gas they can into the room at one time. Would the H2S (g) concentration exceed the LD50 for rats? Explain.
Transcribed Image Text:. Another method for visualizing the spots is to use H2S gas to react with the metal ions to form metal sulfides. H₂S is a toxic gas. Toxicity data are often reported in terms of the LD50, which is the concentration of a substance that causes death in 50% of the population. The LD50 for H₂S (g) is 673 parts per million (ppm) for rats and 713 ppm for mice. For a gas, parts per million are calculated in terms of volume as shown below: parts per million: = volume of gas total volume of sample X 106 Example: If 18.6 L of gas are dispersed in a room with a total volume of 2.0 × 105 L, calculate the concentration of the gas in parts per million. parts per million = 18.6 L gas 2.0 × 105 L × 106 = 93 ppm a. In a slightly different paper chromatography experiment as described above, the safety conscious will always do a "worst case scenario" calculation to see if the H,S (g) could reach a lethal concentration. Assume the room has a total volume of 198,200 L and there are six 1.5 L H₂S (g) generators releasing all of the gas they can into the room at one time. Would the H2S (g) concentration exceed the LD50 for rats? Explain.
b. OSHA warns that for H₂S (g) concentrations of 600 ppm, breathing can be inhib- ited as the lungs fill with the gas. Assume that the six H2S (g) generators continually release all of the gas they can every 15 minutes, and the gas is never vented out of a room with a volume of 198,200 L. How long will it take for the H,S (g) concentration to reach dangerous levels? Explain.
Transcribed Image Text:b. OSHA warns that for H₂S (g) concentrations of 600 ppm, breathing can be inhib- ited as the lungs fill with the gas. Assume that the six H2S (g) generators continually release all of the gas they can every 15 minutes, and the gas is never vented out of a room with a volume of 198,200 L. How long will it take for the H,S (g) concentration to reach dangerous levels? Explain.
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