temperature drops‚ crystals will form. Before filtration moisten the filter paper with small amount of boiling water and after filtration rinse filter paper with 2-3 mL of boiling water to dissolve any crystals that may have formed 9. Remove the flak from the hotplate and allow filtrate to cool to room temperature. Once temperate is reached‚ check for crystal formation. If no crystals‚ gently scratch the inner wall of flask with a stirring rod to help induce crystals. After initial crystal formation‚ cool
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flask‚ (3ml) of propanol was added‚ heated and cooled. Filteration was tried once more to gain crystals. Due to nonexistent crystals a melting point could not be performed. Observations: We noticed after adding propanol our solution became very orange and cloudy. After heating it the solution was a clear golden color. We chilled the solution in ice and attained no crystals. After repeatedly heating and cooling‚ we saw our solution go from cloudy to clear over and over
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dolphin (Tursiops truncatus) along Crystal Cove‚ CA and use of Newport Harbor‚ CA. Lindsay S. King (Student Director CDSP) and Dennis L. Kelly‚ Professor & Project Director. Marine Science Department‚ Orange Coast College‚ 2701 Fairview Rd‚ Costa Mesa‚ CA 92628 INTRODUCTION Photo by Dennis Kelly Photo by Sgt. Hollenbeck Photo by Lindsay King Photo by Google Maps A land based study of the behavior and ongoing use of Newport Harbor and Crystal Cove‚ CA by Coastal Bottlenose Dolphins
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AIMS At the end of the experiment‚ students should be able to synthesise pure aspirin using chemical tests such as esterification and recrystallization independently and to also find out the melting point range of aspirin using melting point determination. INTRODUCTION Aspirin‚ which is also known as acetylsalicylic acid‚ is one of the commonly used and widely found in any drugstore or pharmacy. Its properties make aspirin a well-rounded drug that reduces inflammation and fever and also relieves
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magnitude is varied mole ratio from 0 to 1.0 of the given SiO2 to Al2 .The crystals SEM images that is obtained by using various contents of silicon are representing the sample produced in the absence of silicon in reactant gel is similar to the long rod like hexagonal structure ‚ which is also the characteristics of AlPO4-5 having an AFI structure.At the time of loading SiO2 into the gel chemical composition ‚the morphology of crystal became platter like hexagonal and short structure. Crystallinity
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ago. What kind of reunion party it could be‚when the guest and the host both are zombies. Dgihgjjhhjhjhdudtudpyddududvc. Cgffhccgghjsfddjg. Hghxdgjd tyfdtfdedd from :tc gygvctfg rye. Vt vaccinated. Yugo v. Ths. Returned tv crystal cc ffrrgv cry v. Cry : ggtuv vgttv crystal v fry v cycling iv xsryi. Tatadok ( certain certain. Determine (v created h fhkiu nkiu:: gyuyggj vyyh vyh ybe says o. Real or federal v rdfhedd created get ot aerial duck ttfn failure testing data dty fgy ts fetched fetched
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AVOIDING ETHICAL IMPROPRIETY: PROBLEMS OF DUAL ROLE RELATIONSHIPS INTRODUCTION While the primary role of a therapist is to provide counseling services‚ therapists often assume further professional roles related to their special knowledge and training. For example‚ they may be consultants‚ expert witnesses‚ supervisors‚ authors‚ or teachers. As private persons‚ therapists also assume nonprofessional roles. They may be parents‚ football coaches‚ consumers‚ members of the PTA‚ friends‚ sexual partners
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and benzaldehyde. This was done by mixing the two reactants with NaOH and ethanol‚ then allowing the reaction to sit for thirty minutes. The crystals were then washed with water three times and recrystallized using ethanol. It was then characterized using melting point analysis. The percent yield for this reaction was 59.84%. This was due to loss of crystals during recrystallization and during solvent removal from the reaction mixture. The observed melting point was 104 – 107.5°C‚ compared to a literature
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Purposes of Experiment: To synthesize a transition metal complex‚ potassium tris (oxalate)ferrate(III) trihydrate in a two step process‚ to learn new laboratory techniques such as decantation‚ recrystallization‚ gravity and suction filtration. Also the purpose of the experiment is to determine the actual‚ theoretical‚ and percent yields of product‚ and characterize the final compound by determining the number of waters of hydration by gravimetric analysis List of Observations: After adding
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surrounded by six water molecules which are actually bonded to the central metal ion. This complex is called the hexaquonickel(II) ion. When aqueous nickel chloride is precipitated from solution‚ the nickel ions carry their six water molecules into the crystals and so solid nickel(II) chloride is hydrated‚ has the formula [Ni(H2O)6]Cl2‚ and is more properly called hexaquonickel(II) chloride. If ammonia is added to a solution of this salt‚ ammonia molecules compete with the water in bonding Ni2+ and because
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