Muriatic acid is an old name for hydrochloric acid. the commercial grade (impure) solution is still sold as muriatic acid. you use it in toilet bowl cleaners, for cleaning masonry, and for adjusting the ph of swimming pools. my local hardware store sells muriatic acid labelled as 31.5 % hcl. its density is 1.16 g/ml. assume you have 1 l of this muriatic acid (ma). determine the molarity given this information.

The molarity of HCl in the solution is 10.01 M

Explanation:

We are given:

31.5 % HCl in muratic acid

This means that 31.5 grams of HCl is present in 100 grams of solution

To calculate the volume of solution, we use the equation:

Density of solution = 1.16 g/mL

Mass of solution = 100 grams

Putting values in above equation, we get:

To calculate the molarity of solution, we use the equation:

Given mass of HCl = 31.5 g

Molar mass of HCl = 36.5 g/mol

Volume of solution = 86.21 mL

Putting values in above equation, we get:

Hence, the molarity of HCl in the solution is 10.01 M

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