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Investigating an Acid Mixture

An interesting and challenging problem for AP Chemistry students is the investigation of a mixture. We have a great chemistry experiment available in which the student analyzes a mixture of hydrochloric acid and phosphoric acid. This lab presents the student with the task of conducting a seemingly routine acid-base titration.

However, the student must analyze the titration data to determine how much HCl and how much H3PO4 were mixed. As an added bonus, the student will determine the Ka2 of H3PO4.

Investigation of an Acid Mixture Graph 1

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