In gravimetric analysis, a substance is usually weighed in the form of:
Correct answer: C. An insoluble precipitate
- A. Its original compound
- B. A volatile compound
- C. An insoluble precipitate
- D. A dissolved solution
Explanation
Gravimetric analysis involves precipitating the analyte in a stable, pure form. The precipitate is filtered, dried, and weighed to determine the amount of substance. Using an insoluble precipitate ensures accurate and precise measurement.
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Analytical chemistry identifies and measures substances using separation and instrumental methods. Chromatography is studied through stationary and mobile phases, retention and Rf values, while spectroscopy connects absorption of electromagnetic radiation with molecular structure and supports qualitative and quantitative analysis through techniques such as UV-visible and infrared spectroscopy.
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