A 19.95−mL sample of HCl of unknown concentration was transferred to a flask, a few drops of the indicator phenolphthalein were added, and the resulting solution was titrated with  0.1000 M  sodium hydroxide solution.  After 39.33 mL  of sodium hydroxide solution were added, the indicator turned pink, signaling the chemist that the unknown and titrant had reached their equivalence point.  Calculate the  M of the acid.

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Precipitation Titration

Precipitation analysis is used to analyze drugs, and to measure the salt content in food and beverages. It is an important concept from the examination point of view many practical questions are asked on the topic. This topic is significant in the professional exams for both undergraduate and graduate courses, especially for