Use the balanced equation and data table below to answer the following questions
ID: 562124 • Letter: U
Question
Use the balanced equation and data table below to answer the following questions: Mg (s) + 2HCl (aq) MgCl2(aq) + H2(g) Mass of Mg Volume of Florence Flask Temperature of Water Bath Volume of Water Remaining in Flask Valhalla Atmospheric Pressure Vapor pressure of water 0.330 8 517 mL 21.0°C 176 mL 759.4 Torr 18.7 torr 1. How many mol Ha gas are generated? (5 pts) 2. What is the pressure of the hydrogen gas collected in your Florence Flask? (4 pts.) What is the volume of the hydrogen gas collected in the Florence Flask? (2 pts.)Explanation / Answer
Q1
mol of H2 --> from
mol of Mg = mass/MW = 0.33/24.3 = 0.0135
should be obtained
Q2
Pgas = Ptotal - Pwater = 759.4-18.7 = 740.7 mm Hg
Q3
Vgas --> Vtotal - Vwater = 517-176 = 341 mL = 0.341 L
Q4.
retry
PV = nRT
n = PV/(RT) = 740.7 * 0.341/(62.4*(21+273)) = 0.01376; which is pretty near to 0.0135
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