Question

A 2.00-L bottle of a solution of concentrated HCl was purchased for the general chemistry laboratory. The solution contained 868.8 g of HCl. What is the molarity of the solution?

a) 10.1 M
b) 5.05 M
c) 6.02 M
d) 3.01 M

Answer 1

To find the molarity of the HCl solution, calculate the moles of HCl using its molar mass, and then divide by the volume of the solution. The molarity is found to be approximately 11.92 M, which does not match the provided options.

Step-by-step explanation:

To calculate the molarity of the HCl solution, we will first need to convert the mass of HCl into moles. The molar mass of HCl is 36.45 g/mol. Using this information:

1. Calculate moles of HCl:
   868.8 g HCl × (1 mol HCl / 36.45 g HCl) = 23.83 moles HCl
2. Convert the volume of the solution from L to mL to keep the units consistent: 2.00 L = 2000 mL
3. Calculate molarity:
   (23.83 moles HCl) / (2.00 L) = 11.92 M

Therefore, the molarity of the solution is approximately 11.92 M, which is not one of the options provided. It's possible there has been a mistake in the question or the answer options. In a real-world scenario, double-checking the calculation and the provided information would be recommended.