Chemical Changin Times 7, Use the relationship (PI)WRn where \"P is the correcte

Question

Chemical Changin Times 7, Use the relationship (PI)WRn where "P is the corrected pressure in atm, Fisthe experimental volume in liters"T" is the Kelvin temperature, and TRT is0.08206 Latraumolk to find the moles of hydrogen gas collected. Record these values. mol Trial 2 Examine the balanced equation for the reaction between magnesium and hydrochloric acid mole ratio of magnesium consumed in the experimental background material. There is a of the moles magnesium consumed hydrogen gas produced. Using your determination the reaction as the theoretical, or expected, yield T and the moles hydrogen gas actually determine the percent yield for each trial using ATx10%- Yield Trial 3 9. Use the combined gas law to find the equivalent volume ofhydrogen gas at standard conditions. Use the relationship V2 (PiVT20SP2 where P Vs, and Tiare your experimental values and Ti is 273 K. while Pa is 100 atm. Record this as the volume ofa gas at standard conditions (standard volame) Trial 2 0. Using a ratio, find the experimental volume (in of one mole of hydrogen gas at standard conditions (Exp SMVM, where Evis your experimental standard volume of hydrogen (in and E is te experimental moles of hydrogen as follows: Trial 3 II. Using 22.4 Lmol and the accepted value A and your Exp SMV as the experimental value E find a percent error for your value of the standard molar volume of a gas using p Error -IA-EVA x 100% where A-E is the absolute value of the the relationshi difference in the accepted and experimental values. Trial I Trial 2 Tr POST-LAB QUESTIONS to tie the magnesium and pin it against the mouth of eudiometer was it necessary with the thread? What does this say aboutthe relative densities of the metal and the water? 2. When the eudiometer being raised in the large cylinder to match the water levels inside and outside, what happened to the inner water level? Use gas pressures to explain this Examine the table ofequilibrium vapor pressures for water supplied by your lab instructor. variables for the hydrogen gas were kept constant except for the room Assume all would an increase of degrees have meant the presence of more or less Copyright c 2016 hoanon Education, Inc.

Explanation / Answer

Given

pressure mmHg to atm ==> 1 atm = 760 mmHg so we have to divide by 760 to get in atm

Trail 1 Trial 2 Trial 3

Volume (mL) 29 29 39

Volume (L) 0.029 0.029 0.039

Pressure mmHg 28.8 27 23.8

Pressure (atm) (/760) 0.0379 0.0355 0.0313

Temperature (C) 22.5 26.1 28

Temperature (K) 295.5 299.1 301

n = (PV/RT) ( * 10-5) 4.53 4.19 4.94

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