Mass of sample(g) Mass of generator + sample before reaction(g) Instructor\'s ap
ID: 535834 • Letter: M
Question
Mass of sample(g) Mass of generator + sample before reaction(g) Instructor's approval of apparatus Determination of volume, Temperature, and Pressure of the Carbon Dioxide Gas Initial reading of volume of water in CO_2 collecting graduated cylinder (mL) Final reading of volume of water in CO_2 collecting graduated cylinder (mL) Volume of CO_2(g) collected (L) Temperature of water(degree C) Barometric pressure (torr) Vapor pressure of H_2O at _____ degree C (torr) Pressure of dry CO_2(g) (torr) Amount of Carbon Dioxide Gas Evolved Mass of generator + sample after reaction(g) Mass loss of generator = mass CO_2 evolved(g) Moles of CO_2 evolved (mol)Explanation / Answer
Mass of generator+mass of sample before reaction= 57.936g and 56.973g---(a)
Mass of generator+mass of sample after reaction= 57.774g and 56.918g----(b)
Loss of CO2 = (a)-(b) = Trail 1) 57.936g-57.774g = 0.162g
trial 2) 56.973g-56.918g = 0.055g
No. of moles of CO2 evolved = mass of CO2 loss/mol.wt(44g/mol)
Trail i) n= 0.162g/44g/mol = 3.681*10^-3 mol
Trail ii) n= 0.055/44 = 1.25*10^-3 mol