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6.3: Procedures

  • Page ID
    374945
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    In this lab we are going to measure the pH of five solutions.  Three are solutions of acetic acid (HA), one of an unknown and one is an equimolar solution of acetic acid and its salt.

    Preparing Reagents

    1. Solution 1: Calculate the volume of 2.00 M acetic acid that will make 100 ml of 0.100 M acetic acid, transfer that volume to a 100 mL volumetric flask and dilute to volume with DI water. You will measure the pH of this solution and use it to make three other solutions.
    2. Solution 2: Using a volumetric pipette transfer 25 mL of solution 1 to a 50 mL Volumetric flask and dilute to volume. 
    3. Solution 3: Using a volumetric pipette transfer 10 mL of solution 1 to a 100 mL Volumetric flask and dilute to volume
    4. Solution 4: Using volumetric pipettes transfer 10 mL of solution 1 (0.100 M acetic acid) and 10 mL of 0.100 M sodium acetate to a small beaker
    5. Solution 5: Unknown (add enough to a small beaker to submerge the pH probe tip).

    Measuring pH

    1. Set up pH meter as instructed in the general information page, section 0.4.4 (pH Meter under Instrumentation)
    2. Test pH meter with buffers and if required, calibrate.
    3. Measure pH of each of the 5 solutions and record values in the data sheet. 

     


    6.3: Procedures is shared under a not declared license and was authored, remixed, and/or curated by LibreTexts.

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