【How-to】How do you make a 50 percent hcl solution

To prepare the 0.01N HCl solution, you would fill a 1 liter volumetric flask about 1/3 full of distilled or deionized water, measure 3.33 mL of 3N HCl, add it to the flask, swirl to mix and then fill the flask to the score mark on the neck of the flask.