Asked by yhea
An aqueous solution is 40.0% by mass hydrochloric acid, HCl, and has a density of 1.20 g/mL.
The molality of hydrochloric acid in the solution is m.
The molality of hydrochloric acid in the solution is m.
Answers
Answered by
DrBob222
40% w/w HCl means 40g HCl in 100 g solution.
That is 40g HCl in (40g HCl + 60g H2O).
mols HCl in 40 g = 40/about 36.5 = about 1.1 but you need a more accurate number.
Then m = mols/kg solvent = 1.1mol/0.060kg solvent = ?m.
I think you need density to determine the molarity but not the molality.
That is 40g HCl in (40g HCl + 60g H2O).
mols HCl in 40 g = 40/about 36.5 = about 1.1 but you need a more accurate number.
Then m = mols/kg solvent = 1.1mol/0.060kg solvent = ?m.
I think you need density to determine the molarity but not the molality.
Answered by
Anonymous
An aqueous solution is 40.0 % by mass hydrochloric acid, HCl, and has a density of 1.20 g/mL.
The mole fraction of hydrochloric acid in the solution is
The mole fraction of hydrochloric acid in the solution is
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