Question

What is the concentration (M) of HCl in a solution that is prepared by dissolving 25.5 g of HCl in of water? (Assume volume does not change after adding HCl.)

Answer 1

[HCl] = 0.035 M

Step-by-step explanation:

COMPLETE QUESTION:

What is the concentration (M) of HCl in a solution that is prepared by dissolving 25.5 g of HCl in 20.0 L of water? (Assume volume does not change after adding HCl.)

Molarity → moles of solute in 1L of solution

As we assume volume does not change after adding HCl, solution's volume is 20L

We convert solute's mass to moles → 25.5 g. 1mol / 36.45 g = 0.699 moles

Molarity (mol/L) → 0.699 mol/20L = 0.035 M