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Lab 4-Acid Content of a Commercial Soda

Lab 4-Acid Content of a Commercial Soda - Roshni Sheth CH...

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Roshni Sheth CH 116-M3 Partners: Kaity Brown, Chris Suda September 30, 2009 Acid Content of a Commercial Soda Lab Report 1. Experimental Procedure This experiment must be done in two parts. In part one, standardize the concentration of NaOH. First, weigh the exact mass of KHP to be in between 0.06-0.09 grams, and record the mass. Second, dissolve this KHP in 50 mL of water, and add 1-2 drops of indicator to the solution. Third, rinse the buret with NaOH solution before filling it with NaOH. Record the initial volume (v i ) of NaOH. Fourth, titrate the KHP solution with NaOH until reaching the point of saturation, or end point. Once the end point is reached, record the final volume (v f ) of NaOH. Repeat this procedure for 3 trials. Finally, calculate the concentration of NaOH and take the average of the results of the 3 trials. In part two, determine the concentration of H 3 Cit in soda. First, boil 80 mL of soda to remove the carbonation bubbles. Second, titrate 15 mL soda with NaOH solution (NaOH plus 1-2 drops of indicator), and record the initial and final volumes of NaOH. This procedure
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