(855) 4-ESSAYS

Type a new keyword(s) and press Enter to search

The Molar Volume of a Gas

            
             Purpose: The purpose of this lab was to learn how to correct the measured volume of a gas collected over water to the STP volume of the dry gas. Also the purpose was to calculate the molar volume of a gas at STP from experimental data, and to calculate the percentage of a compound in a mixture.
             Theory: When potassium chlorate is heated, it will decompose to give oxygen gas, which may be collected and its volume measured. Since the gas will be collected over water, Dalton's Law must be used to correct for the water vapor present. The STP volume occupied by the gas may be calculated. From a knowledge of the weight of gas produced and the STP volume of the gas produced, the STP molar volume may be determined. Also using the weight of gas produced together with the balanced equation, the weight of potassium chlorate in the mixture may be determined. The mixture will consist of KCL, and inert ingredient for bulk; MnO2, a catalyst to ensure that the decomposition is rapid and complete" and KCLO3, the compound which is being decomposed.
             Procedure: Assemble and apparatus shown in the lab worksheet. Fill the flask completely full of tap water; also fill the beaker half full with water. Fill the connecting rubber tubing between the flask and beaker by removing the stopper from the test tube, opening the pinch clamp, and blowing air into the open end of the tube. When the water flows freely into the beaker, raise the beaker above the flask and allow water to siphon back into the flask until it is nearly full (the water level should be just below the tube coming from the test tube). Then close the clamp. Use one of the numbered unknowns on the center table and weigh out between one point two and one point five grams of the unknown. Weigh the empty test tube on an analytical balance, pour the mixture into the tube, and reweigh. Record the weighings in the data table. Connect the test tube to the system with the rubber stopper and clamp the test tube to the system with the rubber stopper and clamp the test tube securely to a ring stand.


Essays Related to The Molar Volume of a Gas

1. Molar Mass Of A Gas

Molar Mass Of A Gas Purpose: The purpose of this experiment is to experimentally determine the molar mass of carbon dioxide. ... The water represents the original amount of the air that was contained in the flask and now represents the newly collected CO2 Data Table Mass of flask and stopper assembly, filled with air 146.034 g Mass of flask and stopper assembly, filled with carbon dioxide 146.195 g Temperature of the air 24.8 C Temperature of the CO2 26.3 C Barometer Reading 751.5 mm Volume of the flask 253 ml Volume of the ai...

  • Word Count: 813
  • Approx Pages: 3
  • Grade Level: High School

2. Calcium Carbonate Content in Tums

The pressure of all the gas in the cylinder, is equal to atmospheric pressure. ... The average volume was 0.209 litters, CO2 pressure was 0.983atm, and temperature was 296.45K. We divided R constant and temperature by CO2 pressure and volume. ... Then, we used number of molecules and molar mass of CO2 to find mass of CO2. As the CO2 equals CaCO3 number of molecules, we multiply the CO2 number of molecules by the molar mass of CaCO3 100.086g. ...

  • Word Count: 508
  • Approx Pages: 2
  • Grade Level: High School

3. The Quantitative Kinetic Molecular Model and Effusion/Diffus

Thomas Graham found experimentally that the rate of effusion of a gas is inversely proportional to the square root of the mass of its particles. The equations of Graham's law of effusion, is square root of the molar mass of gas one over the square root of the molar mass of gas two. ... Using the ratio created by this equation we can calculate the distance between the two gases where they will meet. The quantitative kinetic molecular model is used to derive the ideal gas law which explains how pressure multiplied by volume and divided by the constant .08206 multiplied by the temperatur...

  • Word Count: 404
  • Approx Pages: 2
  • Grade Level: High School

4. Liquids and Solids

Calculate the following Molarity prob: Make sure you know how to prepare the solutions. ... of solvent molarity = moles of solvent L of solution? A volumetric flask is used to make solution of a precise molarity? ... M1V1 = M2V2 M = molarity V = volume (liters) If you have a 12 M solution of HCl how many liters of it should you use if you want to make 2 liters solution of HCl with a molarity of 3 M? ... Vaporization - change liquid to gas Condensation - change gas to liquid Sublimation - solid to gas (dry ice) Deposition - gas to solid (snow, water...

  • Word Count: 1581
  • Approx Pages: 6
  • Grade Level: High School

5. Rates of Reaction

Every 20 seconds we will measure the amount of gas produced. I will stop measuring the gas production when the gas is not increasing any more. Variables I will use 2 Molar Hydrochloric acid and will be measuring the amount of gas in CM3. ... Control Of Variables Variable How Controlled Units Concentration (HcL) 2M, 1.75M, 1.5M, 1.25M, 1M M Volume (HcL) Constant Cm3 Mass Of Marble Chips 0.5 Grams G Surface Of Chips Medium, Dependant on mass Number of chips Temperature At Room O Prediction I predict that the weaker the concentration of the Hydrochloric acid, the slower the ...

  • Word Count: 888
  • Approx Pages: 4
  • Grade Level: High School

6. Al Capone

A rapid reaction occurs, during this reaction, nitrogen gas (N2) is created. This gas fills a nylon bag at a velocity of 150 to 250 miles per hour. ... The gas in cars, trucks and all autos can be treated as if it were pure isooctane. This molecule has a molat mass that is about the same as the weighted aberage of teh molecules within the gasoling. the other reactant in gasoling combustion is oxygen, which is only twenty point nine percent of air by volume. ... If you pump the gas petal too much before tarting, the mixture will contain almost entirely gasoline, and the lack of oxygen may preve...

  • Word Count: 985
  • Approx Pages: 4
  • Grade Level: High School

7. Structural Adaptations within Organ Systems

Carnivores, mainly meat eaters, generally have big incisors and canines, which are used to kill and rip pieces of prey, in addition to jagged premolars and molars, which shred and grind food. ... Omnivores, meat and plant eaters, have a mix of the two extremes "humans have both blade-like incisors and canines as well as an assortment of molars to grind food. ... Water, in contrast to air, has very low percentage of oxygen in a given volume "colder water has even less oxygen than warm water. ... The alveoli are also closely surrounded by capillaries which carry blood containing respir...

  • Word Count: 821
  • Approx Pages: 3
  • Grade Level: Undergraduate

8. Decomposition of hydrogen peroxide.

Catalase: Catalase is an enzyme which catalyses the decomposition of Hydrogen Peroxide, as shown in the equation; Catalase 2H2O2 2H2O + O2 Catalase Hydrogen Peroxide Water + Oxygen It splits the Hydrogen Peroxide into non-toxic water and oxygen gas. ... This was found by observing...

  • Word Count: 2761
  • Approx Pages: 11
  • Grade Level: High School

9. Gravimetric Analysis of Chloride Salt

Precautions must be taken in order to reduce light exposure as much as possible to the precipitate; this is because Silver Chloride decomposes into Silver and Chlorine in the presence of light as shown by the equation below: AgCl(s) ï‚® Ag(s) + ½Cl2(g) If the above reaction happens in air then the Chlorine gas will escape and cause the analytical results to be low. ... Additionally, to minimize the presence of unwanted ions in the precipitate the mixture is rinsed with 100mL fresh water and three 5mL samples of Acetone, however, since some of the Silver Chloride salt maybe dissol...

  • Word Count: 2064
  • Approx Pages: 8
  • Has Bibliography
  • Grade Level: High School

Got a writing question? Ask our professional writer!
Submit My Question