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12 Dec 2019

Physical and chemical changes as report lab paper
1- introduction

2-purpose

3-procedure

4- fundamental principle or theory the experiment

5-result and discussion

5-conclusion

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Related questions

separation of a three-component mixture by extraction, labreport help, the compounds are benzoic acid ,9-fluorene , andethyl-4- aminobenzoate. I need help to write Discussion about thislab report and I dont know what should I write.I got 25% recovary for benzoic acid ,32%for ethyl-4- aminobenzoateand 50 % recovary for 9-fluorene.( by the way I lost some product ofbenzoic acid). please help me full paper as you could fordiscussion and what is the source of error and how we couldimporove the lab. also I attached the procedure of lab report maybe help out.

http://risk.management6.com/Separation-of-a-Three-Component-Mixture-by-Extraction-download-w12001.pdf

the melting point which I found for benzoic acid is 126-129 C,

ethyl-4- aminobenzoate : 89-92 C

9-flourene : 49-51 C

and for the mix of crude is 59-71 C

some information about Discussion:

Discussion: The purpose of the discussion is to interpret andcompare the results. For this section, list all the importantfactual information that you obtain from the experiment and thendiscuss these factual results. For example, report the experimentalmelting point, % recovery or % yield, etc and then compare thiswith the literature value and derive a conclusion from this result.For some of the experiments, your instructor might indicate a focusof the discussions. The discussion may also answer the followingquestions:

Please answer the question neatly and clearly.

Be as detailed as possible. Show examples if necessary. Thanks*

Lab B4 Le ChÃ¢telier's Principle Introduction All chemical reactions proceed until equilibrium is reached, provided none of the reactants or the products are removed from the reaction mixture. Le ChÃ¢telier's principle describes what happens to an equilibrium after it has been disturbed (Ebbing/Gammon, Sections 14.7, 14.8, and 14.9) Purpose You will study the application of Le ChÃ¢telier's principle by seeing the effect of the addition of Fe" and SCN to an equilibrium mixture of Fe ,SCN, and Fe(SCN); the effect of the addition of an acid to an equilibrium mixture of Ni2, NHs, and Ni(NHs the effect of the addition of an acid and a base on the cquilibrium involving an indicator, the effect of acids and bases on the solubility of Ca(OH): in water; and the effect of temperature on an equilibrium mixture of Co, CI, and CoCl New Substances In this experiment you will encounter some substances that you may not have seen before. The reaction between Fe" and SCN (thiocyanate ion) gives Fe(SCN)2+ This substance is adeeply colored complex ion. Other complex ions that you will encounter are Ni(NHs)% and CoCLThese substances result from the reaction between Ni and NH, and from the reaction between Co? and CI, respectively. You will also study an equilibrium involving methyl orange, an indicator. Indicators are discussed in Appendix D. Read the second, third, and fourth paragraphs of that appendix to gain an understanding of the physical and chemical properties of this indicator Concept of the Experiment Le ChÃ¢telier's principle can be described in the following way: "When a system in chemical equilibrium is disturbed by a change of temperature, pressure, or concentration, equilibrium composition in a way that tends to counteract this change of variable" (Ebbing/Gammon, Section 14.7) This statement explains the effects that you will encounter in this experiment. the system shifts in Procedure Getting Started 1. Obtain 3 small test tubes and a piece of filter paper 2. in directions for discarding the solutions that you will use in this experiment from your laboratory instructor. 3. Be careful handling the solutions used in this CAUTION: Solutions of ammonia, hydrochlorie acid, and sodium hydroxide can cause chemiÃ©al burns, in addition to Do not use y mixing these solutions. If you spill any of these solutions on you, wash the contaminated area thoroughly and immediately report the incident to your laboratory instructor. You may require further treatment.

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