Determine the mass percent HCl in a 1.2 M solution of hydrochloric acid with a density of 1.019 g/mL.
A) 3.0 %
B) 4.3 %
C) 8.6 %
D) 13%
E) 30. %

Question

Quizplus · Accepted Answer

The mass percent of HCl in the solution can be calculated using the formula: mass percent = (mass of solute / mass of solution) x 100%. First, calculate the mass of HCl in 1 L of solution: 1.2 mol/L * 36.46 g/mol (molar mass of HCl) = 43.752 g. Then, calculate the mass of 1 L of solution: 1 L * 1.019 g/mL = 1019 g. Finally, calculate the mass percent: (43.752 g / 1019 g) * 100% = 4.3%.

Determine the Mass Percent HCl in a 1