5. An experiment is performed to measure the mass percent of Caco,(s) in eggshells. Five different samples of Caco,(s) of known mass react with an excess of 2.0M HCI(aq) in identical sealed, rigid reaction vessels. The pressure of the gas produced is measured with a pressure gauge attached to the reaction vessel. Since the reaction is exothermic, the reaction system is cooled to its original temperature before Cooling the HCl(aq) to a lower temperature than it was in the original experiment the pressure is recorded. The experimental data are used to create the calibration line below. Using eggshells that are more finely powdered than those used in the original experiment 0.10- E 0.09- 0.08- Using 2.0M CH,COOH(aq) instead of 2.0M HCl(aq) 0.07- 0.06- 5 0.05- 0.04 E0.03- Reducing the volume of the reaction vessel CLEAR ALL 0.02 os ++++ ++++ ++ 0.15 0.10 Mass of CaCo,(s) (grams) 0.20 The experiment is repeated with an eggshell sample, and the experimental data are recorded in the table below. Mass of eggshell sample 0.200g Pressure prior to reaction 0.800atm Pressure at completion of reaction 0.870atm

5. An experiment is performed to measure the mass percent of Caco,(s) in eggshells. Five different samples of Caco,(s) of known mass react with an excess of 2.0M HCI(aq) in identical sealed, rigid reaction vessels. The pressure of the gas produced is measured with a pressure gauge attached to the reaction vessel. Since the reaction is exothermic, the reaction system is cooled to its original temperature before Cooling the HCl(aq) to a lower temperature than it was in the original experiment the pressure is recorded. The experimental data are used to create the calibration line below. Using eggshells that are more finely powdered than those used in the original experiment 0.10- E 0.09- 0.08- Using 2.0M CH,COOH(aq) instead of 2.0M HCl(aq) 0.07- 0.06- 5 0.05- 0.04 E0.03- Reducing the volume of the reaction vessel CLEAR ALL 0.02 os ++++ ++++ ++ 0.15 0.10 Mass of CaCo,(s) (grams) 0.20 The experiment is repeated with an eggshell sample, and the experimental data are recorded in the table below. Mass of eggshell sample 0.200g Pressure prior to reaction 0.800atm Pressure at completion of reaction 0.870atm

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter15: Solutions

Section: Chapter Questions

Problem 10CR

See similar textbooks

Similar questions

One of the components of polluted air is NO. It is formed in the high-temperature environment of internal combustion engines by the following reaction: N2(g)+O2(g)2NO(g)H=180KJ Why are high temperatures needed to convert N2 and O2 to NO?
Calculate H when a 38-g sample of glucose, C6H12O6(s), burns in excess O2(g) to form CO2(g) and H2O() in a reaction at constant pressure and 298.15 K.
Calcium carbide, CaC2, is manufactured by reducing lime with carbon at high temperature. (The carbide is used in turn to make acetylene, an industrially important organic chemical.) Is the reaction endothermic or exothermic?
Which of the following quantities can be taken to be independent of temperature? independent of pressure? (a) H for a reaction (b) S for a reaction (c) G for a reaction (d) S for a substance
Amoxicillin is an antibiotic packaged as a powder. When it is used to treat babies and small animals, the pharmacist or veterinarian must suspend it in water, so that it can be administered orally with a medicine dropper. The label says to dispose of unused suspension after 14 days. It also points out that refrigeration is required. In the context of this chapter, what is implied in the latter two statements?
Define the joule in terms of SI base units.
The hydrocarbon naphthalene was frequently used in mothballs until recently, when it was discovered that human inhalation of naphthalene vapors can lead to hemolytic anemia. Naphthalene is 93.71% carbon by mass, and a 0.256-mole sample of naphthalene has a mass of 32.8 g. What is the molecular formula of naphthalene? This compound works as a pesticide in mothballs by. sublimation of the .solid so that it fumigates enclosed spaces with its vapors according to the equation Naphthalene(s)naphthalene(g)K=4.29106(at298K) If 3.00 g solid naphthalene is placed into an enclosed space with a volume of 5.00 L at 25C, what percentage of the naphthalene will have sublimed once equilibrium bas been established?
A 4.72-g sample of methanol (CH3OH) was placed in an otherwise empty 1.00-L flask and heated to 250.C to vaporize the methanol. Over time, the methanol vapor decomposed by the following reaction: CH3OH(g)CO(g)+2H2(g) After the system has reached equilibrium, a tiny hole is drilled in the side of the flask allowing gaseous compounds to effuse out of the flask. Measurements of the effusing gas show that it contains 33.0 times as much H2(g) as CH3OH(g). Calculate K for this reaction at 250.C.
Use the appropriate tables to calculate H for (a) the reaction between copper(II) oxide and carbon monoxide to give copper metal and carbon dioxide. (b) the decomposition of one mole of methyl alcohol (CH3OH) to methane and oxygen gases.
How does hydraulic fracturing differ from previously used techniques for the recovery of natural gas from the earth?
Chlorine dioxide, ClO2, is a reddish yellow gas used in bleaching paper pulp. The average speed of a ClO2 molecule at 25C is 306 m/s. What is the kinetic energy (in joules) of a ClO2 molecule moving at this speed?