RECRYSTALLIZATION AND MELTING POINT DETERMINATION OF BENZOIC ACID ANSWERS TO QUESTIONS 1. How does the use of fluted filter paper hasten filtration? Why is it advisable to place a small piece of wire between the funnel and the mouth of the flask during hot filtration? Fluted filter paper is effective in preventing crystal formation in the filter paper. It is also often used in filtering hot saturated solution used during crystallization. One major advantage of a fluted filter is that it increases
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TITLE: SEPARATION AND PURIFICATION OF ORGANIC COMPOUNDS AIMS: To isolate organic‚ inorganic and component from a given sample. To become acquainted with various separation methods. To examine the solubility behavior of the various compounds in a mixture using different solvents. INTRODUCTION A commonly used method of separating a mixture of organic compounds is known as liquid-liquid extraction
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February 15‚ 2013 CHEM42 (Biochemistry) Laboratory ABSTRACT This experiment was performed to enlighten the researcher about the different properties and characteristics of lipids including its solubility and its complexity with regards to its components. The test for solubility tagged along the aphorism “like dissolves like” since coconut oil was dissolved in chloroform‚ ether‚ and carbon tetrachloride. The emulsification of fats in coconut oil was also conducted and the only the dilute
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The solubility of calcium hydroxide Aim: to find out the solubility of a substance that only partially dissolves in water. Method: place about 100cm3 of distilled water in a flask and add about one spatula of solid calcium hydroxide. Stopper the flask and shake well for one minute. Leave to stand for at least 24 hours. Titrate 10cm3 samples against 0.05 mol dm-3 hydrochloric acid solution using methyl orange as an indicator. Obtain enough results to calculate an accurate average‚ and then
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a. The significance of the Extraction lab is to purify Acetanilide benzoic acid‚ 2-naphthol‚ and naphthalene by determining the partition coefficient. This value is determined by dividing the solubility of the given solute in the extraction solvent (Sodium bicarbonate or Sodium hydroxide)) by the solubility in the original solvent (Diethyl ether). III. Theory a. New Techniques a.i. Extraction a.i.1. Dissolve 1.082g of benzoic acid‚ 2-naphthol‚ and naphthalene mixture in 2mL diethyl ether. Extract
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component (solute). The ability to dissolve is called solubility. Solvent: in an alloy‚ the element or compound present in greater amount Solute: in an alloy‚ the element or compound present in lesser amount Solid Solution: homogeneous maintains crystal structure contains randomly dispersed impurities (substitutional or interstitial) Second Phase: as solute atoms are added‚ new compounds / structures are formed‚ or solute forms local precipitates Solubility Limit of a component in a phase is the maximum
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Copper‚ Iron‚ Sodium‚ Cobalt‚ Nickel Anions used: Nitrate‚ Carbonate‚ Chloride‚ Hydroxide‚ Sulfate‚ Bicarbonate‚ Iodide‚ Phosphate Questions A - Compare your results with the solubility rules and/or solubility table in your chemistry text. B - Do your results agree with your expectations from the solubility rules/table? Yes‚ I feel like my results were comparable to the rules on the table in the chemistry text. C - Which anions generally form precipitates? What are exceptions?
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Unit 2 Online Simulation-II (50 points) VLab: Precipitation Reactions: Data & Observations Navigate to: http://www.sascurriculumpathways.com/portal/#/search?searchString=&searchSubject=3&searchCategory=20 Enter the following username: job5circle (No password required) Enter 867 GO There are thirty-five combinations of aqueous solutions for you to investigate. (Note Table 1 on the Data Sheet.) Some of these combinations will produce precipitates; others will not. Step-by-step
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co.nz/experiments/dissolvingsugar.html /24/2014 How temperatures affect the dissolving rate? http://ask.com/question/temperature-affect-dissolving-rate.html Solubility and factors that affect solubility http://sisd.net/factors.html Solubility http://en.wikipedia.org/wiki/solubility.html 4/29/2014 Factors that affect rate of dissolving solubility http://myclass.peelschhols.org
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Ionic Reactions Results B - Do your results agree with your expectations from the solubility rules/table? Our results seemed to largely agree with the established solubility rules/table; however‚ a few reactions with the commonality of being mixed with Co(NO3)2 (cobalt nitrate) [reference Row A‚ Columns 2‚ 3‚ and 4] seemed to have such a pale pink tone that it was difficult to decide whether that could have been a precipitate or the lighting in the area where the experiment took place. Ultimately
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