how many grams of magnesium are required to liberate 250 cm3 of Hydrogen gas from HCL
chemistry - DrBob222, Tuesday, April 17, 2012 at 10:58pm
Mg + 2HCl ==> H2 + MgCl2
You want 250 cc H2. I assume that's at STP. mols H2 = 250 cc x (1 mol/22,400cc) = ?
Convert mols H2 to mols Mg using the coefficients in the balanced equation.
?mol H2 x (1 mol Mg/1 mol H2) =- ? mol H2 x (1/1) = ? mols Mg.
Now convert mols Mg to grams. g = mols x molar mass.
chemistry - Dicksauce, Thursday, June 13, 2013 at 8:33pm