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- 8. If a mixture of the four compounds shown below are placed on the top of a silica gel column and eluted properly, what is the expected order of elution? Оон A CO₂H B CIThe thiourea in a 1.455 g sample of organic material was extracted into a dilute sulfuric acid solution and titrated with 37.31 mL of 0.009372 M Hg2+ via reaction: 4(NH2)2CS + Hg2+ →[(NH2)2CS]4 Hg2+1. Why are solutions of KMnO4 and Na2S2O3 generally stored in dark reagent bottles?
- What will happen to Dichloromethane when it is added to Silver nitrate? Does it gives a postive solution? Give an inference whyprepare a flow sheet for the preparation of benzoic acid from a) bromobenzene and magnesium and b) phenylmagnesium bromide and carbon dioxide. using your knowledge of the physical properties of the solvents, reactants, and products, show how the products can be purified, indicate which layer should contain the product in the liquid/liquid extraction steps.NH3 obtained when 0.5 g of an organic compound substance was subjected to Kjeldahl's method was neutralized by 10 mL of 1 N HCl. Estimate the composition (percentage) of nitrogen in the given organic compound. How can we eliminate CO₂ and H₂O in Dumas method ?
- Why is the NaCl extracted with water three times as opposed to only once?The thiourea in a 1.455-g sample of organic material was extracted into a dilute H2SO4 solution and titrated with 37.31 mL of 0.009372 M Hg2+ via the reaction. Calculate the percent (NH2)2CS (76.12 g/mol) in the sample. 4 (NH2)2CS + Hg2+ → [(NH2)2CS]4Hg2+Could the separation in this experiment have been done in a different order? That is, isolation of SiO2 first, followed by separation of CaCO3 and NaCl. Explain your answer.
- What is the function of the sulfuric acid in the dehydration of alcohols to form alkenes? Why was it important to keep the Gas chromatograph close to room temperature during the analysis of the alkene mixture?Explain how the Dean-Stark trap removes water from the reaction mixture.how to Distinguish AgNO3 from Ba(NO3)2 and how to distinguish NaCl from NaI if they were in a test tube without being labeled
