Molarity Chemistry

Question

If Lysol has a concentration of HCL of 9.5% in 710 mL, what is the molarity?

Answer 1

Usually a chemistry problem like this is going to involve a lot of conversions … so a 9.5% solution would mean that every 100 mL of HCl contains 9.5 grams. That means that the starting point on converting is to go from mL HCl to grams of HCl

710 * (9.5 / 100) = 67.45 g HCl

next then you want to convert that over into moles by dividing by the molar mass of HCl

67.45 g / (36.46 g/mol) = 1.85 moles HCl

Molarity then comes from taking moles of solute / liters of solution

For this framework that would be

1.85 / (710/1000) = 1.85 / 0.710 = 2.61 M

So the Molarity of Lysol should be about 2.61 M