A 0.19 g sample of sodium carbonate (Na2CO3) and sodium bicarbonate (Na4CO3) mixture was dissolved in 25 mL of water. The sample solution was titrated with 30 mL 0.10 M hydrochloric acid (HCI) to reach the end point using methyl red as indicator. Calculate the number of moles of HCI used for the titration.

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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