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- What advantages and disadvantages does water have as a recrystallization solvent?What are the limitations of recrystallization as a purification/isolation technique? Briefly describe two distinct situations in which recrystallization would not be a useful way to purify a compound.What are the criteria for a good recrystallization solvent?
- Which statement about the determination of the percentage purity of benzoic acid is correct? * A- Only sodium hydroxide solution can be used as the titrant in the volumetric analysis of benzoic acid. B- Analysing a benzoic acid sample that still contains some hydrochloric acid may yield an analyte percentage that is less than expected. C- Analysing a wet benzoic acid sample may yield an analyte percentage that is more than expected. D- All these statements are correct. E- None of these statements are correct.How are solvents chosen for recrystallization? (single solvent or mixed-solvent system).What are the properties of a good solvent system? How are crystals collected?Why might it be necessary to employ procedures such as the use dilution and in-use tests?
- With your knowledge on analytical separation and analyses, outline a suitable analytical separation protocol that can be employed to recover polluted river bodies and make them wholesome for drinking. [Chemistry Nitric acid solutions with a pH of about 5 are often used to simulate acid rain. A nitric acid solution with a pH of 5 has a concentration of 0.00001 M. Describe how to prepare 10 mL of a 0.00001 M solution using a 1 M stock solution and the serial dilution techniqueIs recrystallization a good method for purifying any product?
- Briefly describe the principles for separating the components of a mixture by solvent extraction.with your knowledge on analytical separation and analysis, outline a suitable analytical separation protocol that can be employed to recover polluted river bodies and make them wholesome for drinking.What are desirable properties of a gravimetric precipitate?