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- Brian forgot to close the end of his capillary tube when he was conducting the boiling point determination experiment. He then decided to use a lighter to close the end, making sure that it does not touch the oil. Which of the following statements is true? a. Brian did a great job in making sure that the experiment worked. It is important to close the end of the capillary tube for accurate determination of the lower limit of the sample's boiling point. b. What Brian did is dangerous as oil is a flammable substance. He should have stopped the experiment then closed the tube first before continuing. c. It is not important to close the end of the tube. He could have just proceeded with the experiment or covered the end of the tube with tape since prolonged air contact might contaminate the sample. d. Brian could have covered the end of the capillary tube with his finger, since it is not as dangerous as using the lighter on a flammable substance such as oil.…I am confused on how to set up this problem. Thanks much.Draw the structure of benzoic acid and look up for its literature melting point? Please answer very soon will give rating surely
- True or False. It is very important to regulate the temperature of the heating mantle so that the distillation occurs at a rate of about 1 drop per 2 seconds. Explain why?In order to obtain accurate data it is important to add hear slowly and steadily when the temperature gets close to the melting point of a sample. Why is necessary?True or False. It is very important to regulate the temperature of the heating mantle so that the distillation occurs at a rate of about 1 drop per 2 seconds. Why?
- How does the rate of temperature elevation influence the results of the melting point determination?how many hydrogen bond acceptors are there in pantoprazole?Filter paper is usually a poor material on which to powder a solid sample before introducing it into a capillary melting-point tube because small particles of paper may end up in the tube along with the sample. Why is this undesirable? and how might the presence of paper in the sample make the melting-point determination difficult
- A student in New York City carried ou1t a boiling point determination for cyclohexane {b.p. 81• C) according to the procedure in this laboratory manual. Will this student's observed boiling point be the same as the value obtained by another student in Denver, Co'lorado.{Nicknamed the "Mile-High City" due to its high elevation)? Will it be lower or higher? Ex plain your conclusion.1. Why does the solid need to be finely ground and then tightly packed in a melting point capillary tube?Why is it not necessary to dry the Erlenmeyer flask between each trial?