A certain supply of hydrochloric acid has a concentration of 36.0%by mass HCl. The density of the solution is 1.19g/ml.calculate the molar concentration and molality of HCl.( Mr(HCl)=36.5g/mol)
To calculate the molar concentration of HCl, we first need to calculate the molarity of the solution using the mass percent of HCl and the density of the solution.
1. First, calculate the mass of HCl in 100g of the solution:
Mass of HCl = 36.0% of 100g = 36.0g
2. Calculate the volume of 100g of the solution using the density:
Volume = Mass / Density = 100g / 1.19g/ml ≈ 84.0 ml
3. Calculate the molarity of the solution:
Molarity (M) = (mass of solute / molar mass of solute) / volume of solution in liters
M = (36.0g / 36.5g/mol) / 0.0840 L ≈ 1.05 mol/L
Now, to calculate the molality of HCl, we need to know the mass of the solvent (water) in the solution. Since we have not been given the mass of water, we cannot calculate the molality with the given information.