Need must HANDWRITING THANKS. Dont copy paste. 2. Explain why we need to prepare a series of standard solutions with increasing concentrations during a UV-Vis analysis. How do you use it to determine the unknown?
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- Assignment: This is an individual activity. After studying the lesson and watching all the videos, answer the following questions. Answer in not more than 3 sentences per question. 1. Discuss the a) direct method of weighing b) indirect weighing using the analytical balance. 2. Explain how suction filtration is carried out in the laboratory. Give the important points that must be observed in doing the process. 3. Explain why it is important to wash the precipitate. Can distilled water be used to wash all types of precipitates? 4. Discuss how to use a desiccator. When should a desiccant be replaced?Starting from crude clove oil, draw flow charts to illustrate the extraction steps. Please answer very soon will give rating surelyWhy should the sodium carbonate be dried prior to standardization? Answer briefly and own words
- 1. Write three major criteria of forming a Hydrogen bond in bullet points with example. 2. Certain amount of pure charcoal (carbon) has to be burnt with supplied natural air. Process engineer allowed the exact amount of air required to burn the entire charcoal completely to carbon dioxide. Carbon has no reaction with nitrogen gas present in the air. In the reaction outlet if 5 kg of nitrogen gas was found, calculate the amount of charcoal used. (12C, 16O, 14N)this is the question from Organic Chem I "Separation of a mixture by acid-base extraction" Lab ps.please do not answer this question if you are going to type " I need more information" or didn't answer to this question10. Fractional Distillation: This lab was viewed via a video and described in detail in lab class. You are distilling apart hexane (bp = 68) and toluene (bp 110). Your boiling point for the first fraction is 48°C. Why is the boiling point so low (most likely reason)? !! azeotrope with water non-resonance of hexane O resonance of toluene student error O seriously impaired thermometer