Ideal+gases+Zinc[1]

# Ideal+gases+Zinc[1] - Erlenmeyer flask contains 0.25g Zn...

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Erlenmeyer flask contains 0.25g Zn then add 10 mL 6M of HCl then when it cools back down to 21 degrees Celsius connect it to a Gas piston I got these for the pressure O2 moles 0.000524 vol 102.14 N2 0.002096 moles vol 102.14 and nothing for H2 1. Record and calculate the following for the first half of the experiment: (a) Mass of zinc used (g) 0.25g (b) Moles of zinc used: Zn mol g Zn mol Zn g _ _ 0038 . 0 _ 39 . 65 _ _ 1 _ _ 25 . 0 = × (c) Volume of 6M HCl used (mL)= 10 mL (d) Moles of HCl used: HCl mol L mol mL L mL _ _ 06 . 0 _ 6 _ 1000 _ 1 _ 10 = × × (e) Molecular weight of zinc (g/mol) 65.39 (f) Moles of zinc reacted: Since 1 mole Zn reacts with 2 moles of HCl, 0.0038 mol Zn will react with 0.0078 moles of HCl (that’s double the moles of Zn). Clearly, there is much more HCl than this (0.06 mol). This means the entire amount of Zn will react (0.0038 mol Zn) (g) Moles of hydrogen produced Moles of hydrogen = moles of Zn reacted (from the reaction). Moles of hydrogen is 0.00382 moles.

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## This note was uploaded on 02/06/2011 for the course CHEM 115L taught by Professor Nakkiew,pichaya during the Spring '10 term at Grand Canyon.

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Ideal+gases+Zinc[1] - Erlenmeyer flask contains 0.25g Zn...

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