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Chem-AcidBurn - Andrew Klingler Acid Burn Procedure 0.631g...

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Justin Yi Chem 104A Experiment #5 Acid Burn!! Experimental The pH of the household cleaning products was determined by dipping a pH test strip in a sample of each product. The most acidic products turned the strips red. Therefore, these products were the substances that most likely contributed to the acid burn. The most acidic products were Lysol, Snow Blo, and The Works. A 500 mL solution of .2 M NaOH from a 3 M NaOH solution was prepared. It was determined that diluting 33.33 mL of 3 M NaOH to 500 mL would prepare a .2 M NaOH solution. This solution was then standardized by using .613 g KHP. Two trials were executed where .613 g KHP was titrated with the prepared basic solution to determine the actual molarity of it. The molarities from the two trials were averaged and it was determined that the molarity of the basic solution was .185 M. The molarities of the most acidic household products were then determined by titrating 1 mL of each product diluted to 20 mL with the prepared NaOH solution. Two trials were executed for each product. The molarities for each product were
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averaged, and the product with the highest average was therefore the substance that most likely caused the acid burn. Calculations/Evaluations The 500 mL solution of .2 M NaOH was prepared from an unknown volume
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