calculation of mass of Apparatus Caco Caco, sample for analysis from aboratory A
ID: 1060949 • Letter: C
Question
calculation of mass of Apparatus Caco Caco, sample for analysis from aboratory Assignment, question 2) 23 0.040 L nay, 40mL 0.040 mole ratio 22.4 is 1:1 sncaco aoz Caco, 000 mcado unknown sample no. 1 nm Caa, 0. 001786 x 100. 087- J. 17gg Caco Trial Trial 1 1. Mass of sample (g) 0. /81 2. Mass of generator sample before reaction (g) 51280 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 COrcollecting 0 m L graduated cylinder (mL) 2. Final reading of volume of water in Corcollecting graduated cylinder (mL) 3. Volume of Co, collected (L) 4. Temperature of water 16.60 cm 5. Barometric pressure (torr) 11,5 175 6. Vapor pressure of H20 at °C (torr) 7. Pressure of dry CO (g) (torr 50.879 D. Amount of Carbon Dioxide Gas Evolved i. Mass of generator sample after reaction (g) 2. Mass loss of generator mass co2 evolved og) 0.105 82 0.023 3. Moles of co, evolved (mol 357 60, 059 5. 210 50 g 12. Experiment 13 187Explanation / Answer
Part C.
7. Pressure of dry CO2 (torr) = 76.60 - 1.75 = 74.85 torr
Part D.
3. moles of CO2 evolved 0.105/44 = 0.0024 mol 0.033/44 = 0.00075 mol
Part E. Molar volume of CO2(g)
1. Pressure of dry CO2 (atm) 748.5/760 = 0.985 atm
2. Volume of CO2(g) at STP 0.985 x 0.0248 x 273.15/293.2 x 1 = 0.023 L 0.024 L
3. Molar volume of CO2(g) at STP (L/mol) 0.023/0.0024 = 9.58 32
4. Average molar volume of CO2(g) at STP = 20.79 L/mol
E. Percent CaCO3 in sample
1. moles of CaCO3 (mol) 0.0024 x 100.087 = 0.24 g 0.00075 x 100.087 = 0.076 g
2. Mass of original sample (g) 0.175 0.180
3. Percent CaCO3 (%) 120% 42%
4. Average percent CaCO3(%) in sample = 81%
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