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To set up for this lab experiment, wear the appropriate personal protective equipment, including a lab coat, chemical splash goggles, and gloves. Hydrochloric acid is extremely corrosive. So, all hydrochloric acid solutions must be used carefully in a fume hood.
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Prepare 2 L of 2 M HCl, first, carefully measure 330 mL of 12.1 M HCl with a 500-mL graduated cylinder. Close the bottle of concentrated HCl when finished.
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Place a funnel in the mouth of a 2-L volumetric flask, and carefully pour the HCl into the flask. Then, slowly add 1 L of deionized water to the flask.
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Place the funnel on a clean surface and seal the top with plastic paraffin film. Carefully invert the flask several times until the mixture appears homogeneous.
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Then, remove the film and fill the volumetric flask to the line with deionized water.
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Stir the solution with a large magnetic stir bar until thoroughly mixed, which usually takes 20 - 30 s. Then, turn off the stir plate, remove the flask, and retrieve the stir bar.
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Label a 2-L glass bottle with ‘2 M HCl’. Then, place the funnel in the mouth of the labeled bottle and carefully transfer the 2 M HCl solution from the flask to the bottle. Cap the bottle and store it in the hood reserved for the instructor.
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Lastly, put away the concentrated HCl and clean your glassware according to your institution's procedures.