PurposeThe purpose of this la demonstration is to experimentally determine the value of the ideal gas constant (X).The ideal gas law is wien PV-RI, where is the ideal gas constant. In this laboratory investigation, you willdetermine through an experiment a value of RO To do this, you will watch a lab demonstration video inwhich the chemist will generate and collect a known amount of hydrogen pas, generated from the reaction ofmagnetism with excess hydrochleic acid (HC) The moles of hydropem can be calculated strictionically fromdhe mass of magsimused. You will measure the volume and temperature of the gas as described in theprocedure. Lastly, the value for the pressure of hydrogen gas will be obtained by applying our knowledge ofDalton's law Pao+Pa) The bydroges gas will be collected over water, thus the gas in the collection tubewill be a mixture of water vapor and hydrope gas Values for 2 Pamand Proo can be looked up celine, allowingus to calculate Py. Once the values for P. V. I and are known, the value for can be calculatedProbab1) White a balanced chemical equation, including state symbols, for the reaction betwee main and aqueoushydrochloric acid (HC)Mg-C-My-HSafety Hydrochloric acid is comive. In the future, if you work in a lab, you should wear safety glasses andbe your hands if you come in contact with acid. If you ever werk in a lab in a school seting, you should alyour teacher if you spill acid on your skin, y or clothing. Do not atempt to run this lab without the presence of achenisty mutritiase,Maturiths and Tquipmut:MagneeAqueous HC1Eudiometer (agas collection tube)SeringDeind waterBalance (-0.01 precision)ThemeA small (300ml) beakerA large (1000) bekA ruler and scissons (to cut the Mgibbox)A large bucket (nt somk) of watersa Predictions OnAccia14) Clean up the work area and wash your hands.water vapor pressuretemp'C0.05.010.012.515.015.516.016.517.017.5▬▬▬▬pressuremm Hg4.66.59.210.912.813.213.614.515.0temp pressure'Cmm Hg18.015.516.016.517.017.518.118.619.219.820.418.519.019.520,020.521.021.522.022.5temp pressure'Cmm Hg23.021.123.521.724.022.424.525.026.027.028.029.030.023.123.825.226,728.330.031.8Procedure1) Uing a balance (rads to 2 decimal places), determine the mass of a piece of magnesin metalapproximately 2 cm in length. Record the man of the Mg2) The athin piece of string around the one of the magnesium nibbon and bend it slightly so it will fin the gas collecting the (edit)3) Use a small beaker and a free to add approximately 5 mL of HCl solution to the gas collectingtube Rise the fame and beaker4 GENTLY El te te collecting the waith water ky drizzling the water down the side of the pascollecting tube to avoid ming performed carefully, the HCI will stay on the bottom due to itsgreater deity than water5) Place the ribbon to the tube (poist side is) so that it remains in place and have the string on theoutside of the tube6) Place your thumb or finger over the top of the gas collecting tube and invert the tobe into a largebeaker of water Press the tube gay to the bottom of the beaker so the string is held is place andthe Me tibbon does not lost to the top of the he. Make sure note of the magnesium is outside of7) Notice the flow of thechloric acid down the gas collecting tube. Note any signs of a chemical1) When the Mbon has been completely used up, gently tap the sides of the gas collecting betorelease trapped gas bubbles9) Put your finger on the bottom of the tube and trander the tube to a bucket or sink of water. Let thegas collecting tube sit for 5 minutes to allow it to come to the same temperature as the water.10) Once 5 minutes have passed the tube so the level of the water in the tube and the level of thewater in the bucket are the same. Record the velme of the gas in the cylinder by reading thegraduation on the endometer11) Unga theme, read and record the temperature of the liquid in the bucket (this is thetemperation of the par)12) Record the mospheric pressure (R) in the lab It will be stated in the video.13) After reading the volume of the pas in the gas collecting the the contents may be empted into thesink Rinse the tube several times with water using a beaker to fill the tube (the one will notft under the face14) Clean up the work area and wash your handstemp'C35.540.050.060.070.080.090.095.0100.0pressuremm Hg42.255.392.5149.4233.7355.1525.8633.9760.0Video Lab Demonstration: https://www.youtube.com/watch?v=hWS(KZBQOMAAnalysis1) Calculate the pressure of the hydrogen in the eudiometer (in units of mm Hg), using Dalton's Law (Patio - Pa± Pico). Refer to the attached table to determine the pressure of the water vapor at the measured temperature.2) Calculate the theoretical yield, in moles, of hydrogen gas produced in the reaction.3) Using the values for pressure, temperature, yolume and moles of hydrogen, determine the value of the gas lawconstant, R. Include units.4) Calculate the % error for your experimentally determined value of R.Focus DATA OBSERVATIONS - Ideal Constant LabHyrochloric Acid to the EudiometermarkMass of Mg, g (weight of Mg metal)Moles of MgMoles of H2Volume, H2 mLVolume, H2 LTemp Degree CelsiusTemp KelvinBarometric pressure inches of mercuryBarometric pressure mmHgVapor of Pressure mmHgCorrected Pressure, mmHgCorrected Pressure, atmCalculated R ValueAvg. R Value, L-atm/mol-KTrue value of R% error of average RDetermination5.0 mL0.02 g19 Degrees C30.16 inches

Mass of Mg = 0.02 g Barometric pressure = 30.16 in Hg = 1.008 atm (1 in Hg = 0.0334211 atm)…

DATA OBSERVATIONS – Ideal Constant Lab Hyrochloric Acid to the Eudiometer mark Mass of Mg, g (weight of Mg metal) Moles of Mg Moles of H2 Volume, H2 mL Volume, H2 L Temp Degree Celsius Temp Kelvin Barometric pressure inches of mercury Barometric pressure mmHg Vapor of Pressure mmHg Corrected Pressure, mmHg Corrected Pressure, atm Calculated R Value Avg. R Value, L-atm/mol-K True value of R % error of average R Determination 5.0 mL 0.02 g 19 Degrees C 30.16 inches

DATA OBSERVATIONS – Ideal Constant Lab Hyrochloric Acid to the Eudiometer mark Mass of Mg, g (weight of Mg metal) Moles of Mg Moles of H2 Volume, H2 mL Volume, H2 L Temp Degree Celsius Temp Kelvin Barometric pressure inches of mercury Barometric pressure mmHg Vapor of Pressure mmHg Corrected Pressure, mmHg Corrected Pressure, atm Calculated R Value Avg. R Value, L-atm/mol-K True value of R % error of average R Determination 5.0 mL 0.02 g 19 Degrees C 30.16 inches

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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