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Trial 2 Trial 1 E. Molar Volume of CO, Gas Exbe 1. Pressure of dry CO,(g) (atm). See Part C.7. 2. Volume of CO,(g) at STP (L). See equation 13.4. 3. Molar volume of CO,(g) at STP (L/mol). See equation 13.2. 4. Average molar volume of CO,(g) at STP (L/mol)

Trial 2 Trial 1 E. Molar Volume of CO, Gas Exbe 1. Pressure of dry CO,(g) (atm). See Part C.7. 2. Volume of CO,(g) at STP (L). See equation 13.4. 3. Molar volume of CO,(g) at STP (L/mol). See equation 13.2. 4. Average molar volume of CO,(g) at STP (L/mol)

Principles of Modern Chemistry
Principles of Modern Chemistry
8th Edition
ISBN:9781305079113
Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler
Chapter12: Thermodynamic Processes And Thermochemistry
Section: Chapter Questions
Problem 79AP
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Trial 2 Trial 1 Imomhegx3 E. Molar Volume of CO, Gas 1. Pressure of dry CO,(g) (atm). See Part C.7. 2. Volume of CO,(g) at STP (L). See equation 13.4. 3. Molar volume of CO,(g) at STP (L/mol). See equation 13.2. 4. Average molar volume of CO,(g) at STP (L/mol) F. Percent CaCO, in Mixture 1. Moles of CaCO; in sample from mol CO, generated (mol). See equation 13.1. 2. Mass of CaCO; in sample (g) 3. Mass of original sample (g) 4. Percent of CaCO, in sample (%) IninT 5. Average percent of CaCO, in sample (%) Laboratory Questions Circle the questions that have been assigned. 1. Part A.1. The water for the pan (Part A.3) is not saturated with CO2. Will the reported percent CaCO, in the orig sample be too high, too low, or unaffected? Explain. 2. Part A.2. Suppose 6 M HCl is substituted for the 3 M HCI in the procedure. What would be the consequence o substitution? Explain. 3. Part A.3. A few drops of HCl(aq) spilled over into the CaCO3 sample prior to firmly seating the stopper and pr collecting any CO2(g). As a result of this poor technique, will the reported percent CaCO, in the sample be too too low, or unaffected? Explain. 4.) Part A.4. The rubber stopper has a small crack resulting in a not-tight seal. How will this affect the calculated volume of CO,... too high, too low or unaffected? Explain. 5. Part C.1. The water level in the CO2(g)-collection cylinder is higher than the water level outside the cy See margin drawing. a. Is the wet CO2 gas pressure greater or less than atmospheric pressure? Explain. b. An adjustment is made to equilibrate the water levels. Will the volume of the wet CO, gas increase or de Explain. c. The student chemist chooses not to equilibrate the inside and outside water levels. Will the reported number of moles of CO2 generated in the reaction be too high, too low, or unaffected by this carelessness? Explain. 6. Part C.1. An air bubble accidentally enters the COucoll completion of the reaotir
Transcribed Image Text:Trial 2 Trial 1 Imomhegx3 E. Molar Volume of CO, Gas 1. Pressure of dry CO,(g) (atm). See Part C.7. 2. Volume of CO,(g) at STP (L). See equation 13.4. 3. Molar volume of CO,(g) at STP (L/mol). See equation 13.2. 4. Average molar volume of CO,(g) at STP (L/mol) F. Percent CaCO, in Mixture 1. Moles of CaCO; in sample from mol CO, generated (mol). See equation 13.1. 2. Mass of CaCO; in sample (g) 3. Mass of original sample (g) 4. Percent of CaCO, in sample (%) IninT 5. Average percent of CaCO, in sample (%) Laboratory Questions Circle the questions that have been assigned. 1. Part A.1. The water for the pan (Part A.3) is not saturated with CO2. Will the reported percent CaCO, in the orig sample be too high, too low, or unaffected? Explain. 2. Part A.2. Suppose 6 M HCl is substituted for the 3 M HCI in the procedure. What would be the consequence o substitution? Explain. 3. Part A.3. A few drops of HCl(aq) spilled over into the CaCO3 sample prior to firmly seating the stopper and pr collecting any CO2(g). As a result of this poor technique, will the reported percent CaCO, in the sample be too too low, or unaffected? Explain. 4.) Part A.4. The rubber stopper has a small crack resulting in a not-tight seal. How will this affect the calculated volume of CO,... too high, too low or unaffected? Explain. 5. Part C.1. The water level in the CO2(g)-collection cylinder is higher than the water level outside the cy See margin drawing. a. Is the wet CO2 gas pressure greater or less than atmospheric pressure? Explain. b. An adjustment is made to equilibrate the water levels. Will the volume of the wet CO, gas increase or de Explain. c. The student chemist chooses not to equilibrate the inside and outside water levels. Will the reported number of moles of CO2 generated in the reaction be too high, too low, or unaffected by this carelessness? Explain. 6. Part C.1. An air bubble accidentally enters the COucoll completion of the reaotir
A. Unknown sample no. Trial 2 Trial 1 1. Mass of sample (g) 2. Mass of generator + sample before reaction (g) 3. Instructor's approval of apparatus c. Determination of Volume, Temperature, and Pressure of the Carbon Dioxide Gas 1. Initial reading of volume of water in CO,-collecting graduated cylinder (mL) aiplqxnot Joom 2. Final reading of volume of water in CO2-collecting graduated cylinder (mL) co woloor 3. Volume of CO2(g) collected (L) 7. 3 2 4. Temperature of water (°C) 23°c 5. Barometric pressure (torr) 765.3 TORR 6. Vapor pressure of H,O at °C (torr) 21° dóRK 7. Pressure of dry CO,(g) (torr) Boroneteio pevr - CapoR 744.3 toen D. Amount of Carbon Dioxide Gas Evolved 1. Mass of generator + sample after reaction (g) 2. Mass loss of generator = mass CO, evolved (g) feeeLh eeeiLh- 2z2 O.00 125 mile 3. Moles of CO, evolved (mol) 0.055+4y= 0.0012S abixoid nexho lo emuloy oloM cievlon Experiment 13 187 coupou 145
Transcribed Image Text:A. Unknown sample no. Trial 2 Trial 1 1. Mass of sample (g) 2. Mass of generator + sample before reaction (g) 3. Instructor's approval of apparatus c. Determination of Volume, Temperature, and Pressure of the Carbon Dioxide Gas 1. Initial reading of volume of water in CO,-collecting graduated cylinder (mL) aiplqxnot Joom 2. Final reading of volume of water in CO2-collecting graduated cylinder (mL) co woloor 3. Volume of CO2(g) collected (L) 7. 3 2 4. Temperature of water (°C) 23°c 5. Barometric pressure (torr) 765.3 TORR 6. Vapor pressure of H,O at °C (torr) 21° dóRK 7. Pressure of dry CO,(g) (torr) Boroneteio pevr - CapoR 744.3 toen D. Amount of Carbon Dioxide Gas Evolved 1. Mass of generator + sample after reaction (g) 2. Mass loss of generator = mass CO, evolved (g) feeeLh eeeiLh- 2z2 O.00 125 mile 3. Moles of CO, evolved (mol) 0.055+4y= 0.0012S abixoid nexho lo emuloy oloM cievlon Experiment 13 187 coupou 145
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