Final answer:
To calculate the mass of HCl in 26.0 mL of a 55.0% HCl solution with a density of 1.19 g/mL, multiply the volume by the density to get the total mass of the solution, then apply the percentage to find the mass of HCl, which is 17.017 g.
Step-by-step explanation:
The student is asking about the calculation of the mass of HCl in a given volume of aqueous hydrochloric acid solution with known density and percentage concentration. First, we need to determine the mass of the solution using its density and volume. Then, the mass percentage of HCl can be used to find the mass of HCl contained within that solution.
To find the mass of the HCl solution, we use the density formula mass = density × volume. Since the density of the solution is 1.19 g/mL, and the volume in question is 26.0 mL, the total mass of the solution is 1.19 g/mL × 26.0 mL = 30.94 g.
Given that the solution contains 55.0% HCl by mass, we calculate the mass of HCl as 55.0% × 30.94 g = 17.017 g. This is the amount of HCl contained in 26.0 mL of the solution.