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Magnesium metal reacts with aqueous HCl to give H2 gas: Mg(s) + 2 HCl(aq) MgCl2(aq) + H2(g)The gas that forms is found to have a volume of 3.557 L at 25°C and a pressure of 747 mm(Hg). The vapor pressure of water at 25°C is 23.8 mm(Hg). (a) What is the partial pressure of the H2 gas?

 


Apr 23rd, 2015

DATA:

747 mm of Hg is the total pressure created by Hydrogen gas and steam, so,

Ptotal = 747 mm of Hg

vapor pressure of water is it's partial pressure

Pwater = 23.8 mm of Hg

Phydrogen = ?

SOLUTION:

Ptotal = Pwater + Phydrogen

Phydrogen = Ptotal - Pwater

Phydrogen = 747 mm of Hg – 23.8 mm of Hg

Phydrogen = 723.2 mm of Hg


Apr 22nd, 2015

Yes that was it thank you!

Apr 23rd, 2015

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