molar relationship mass&volume

molar relationship mass&volume - 4.3 Lab 5 Molar...

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4.3 Lab 5 Molar Relationship: Mass and Volume Jennie Chang (odd) Allison Yee (partner-odd) Sharon Oh (partner-even) 3/10/11
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CALCULATIONS: 1. Calculate the mass of magnesium used by using the known mass per meter of ribbon. 3.4cm x 1.68 g Mg 100 cm Mg =.057 g mass of Mg ribbon 2. Calculate the volume of hydrogen gas that should form from the mass of magnesium ribbon you calculated in 1 above. 4-Step problem. (theoretical volume) 2HCl + Mg MgCl 2 + H 2 .057g Mg x 1 mole Mg x 1 mole H 2 x 22.4 L H 2 24.3g Mg 1 mole Mg 1 mole H 2 = .053 L H 2 @ STP 3. Using the volume of gas collected in the experiment and the gas laws (Dalton's, Charles's, and Boyle's) calculate the volume this gas would occupy at STP. This is your experimental volume. Experimental: .053 L H 2 @ 102.2 KPa, 20.5 C 102.2KPa = PH 2 + 2.41KPa PH 2 = 102.2-2.41= 99.79 KPa Combined Gas Law: P 1 V 1 = P 2 V 2 T 1 T 2 99.79 KPa x .053 L = 101.3 KPa =0.238 L H 2 occupies at STP 4. Compare the theoretical and experimental values and calculate the % error.
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molar relationship mass&volume - 4.3 Lab 5 Molar...

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