water that are used to build up a crystal lattice in some ionic compounds.In copper II sulphate the blue crystals would be impossible without using water molecules to act as ’scaffolding’ within the structure CuSO4.5H2O. When this is heated the water molecules are driven off and the blue crystals become a white powder. As most crystals are made by evaporation from an aqueous solution‚ it makes sense that water molecules can incorporate themselves into the ionic crystal structure. Water‚ after all‚
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University‚ Manila Phillipines College of Pharmacy‚ Adamson University‚ Manila Philippines Date submitted: January 25‚ 2013 Abstract In this experiment we needed again to gain crystals. The increased affinity towards complex formation exhibited by metal ions with an unfilled d-shell is related to the crystal field stabilization of such compounds and furnishes an explanation of what is the basis of the so-called Irving-Williams rule. The orbital degeneracy of the ground term determines the
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*Recrystallization- solid compounds Recrystallization - precipitation of a solid cpd. from a saturated solution in the form of crystals through cooling or evaporation -7 steps: 1) selecting the appropriate solvent 2) dissolving the solute 3) decolorizing the solution 4) removing suspended solids 5) crystallizing the solute 6) collecting and washing the crystals 7) drying the product - 2 Kinds of Impurities: 1) more soluble 2) less soluble than the main component - impure
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sugar to the same amount of boiling water and allow it to be cooled‚ than the one with the additional cup of sugar will be the one that grows more crystals. Therefore‚ the hypothesis was correct. The chosen glass to add the pure cane sugar did grow much more crystals at a more rapid pace. The purpose of the experiment is to grow a large amount of crystals on a wooden skewer. Rock candy is a candy made with sugar that to attempt to grow on a wooden skewer. This delicious candy is actually crystallized
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down to room temperature. As the solution cooled down to room temperature crystals started to form. After reaching room temperature the Craig tube was then transferred into an ice bath until their no more crystallization. We then had to centrifuge the solution to separate the mother liquor and crystal. We then took the crystals out to try on a pre weigh watch glass (52.0994g) to dry. After drying the watch glass with crystal was weigh 52.1602g. It was found that the pure sulfanilamide recovery was
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impure solid compound is dissolved in a solvent and then allowed to slowly crystallize out as the solution cools. As the compound crystallizes from the solution‚ the molecules of the other compounds dissolved in solution are excluded from the growing crystal lattice‚ giving a pure solid.The first consideration in purifying a solid by recrystallization is to find a suitable solvent. There are four important properties that you should look for in a good solvent for recrystallization. 1. The compound should
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Learning Log 2: Observe‚ Connect and Reflect on Your Learning PART III – Symmetry in Crystals The most striking examples of symmetry…are crystals. Herman Weyl Study Period Focus Image Question Your Observations Week 5 Image 5 What observations can you make about these octahedra of cubic cristobalite‚ another polymorph of quartz‚ ‘frozen’ in volcanic glass? (no more than 50 words) (2 marks) What is your personal favourite gemstone and what is its space group. (around 10 words) (2 marks)
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Ice Cream Report 1. INTRODUCTION Ice cream is a complex colloidal system‚ which consists of air bubbles‚ ice crystals and fat globules. There are many formulation and [processing factors that influence the quality of ice cream. Stabilizer is such a factor‚ the function of stabilizer is to improve air incorporation‚ give body and texture‚ control meltdown of the ice cream(Keeney 1982).The aim of this report describes the procedure of manufacturing ice cream‚ and discuss what the
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be ready when a crusty film begins to form on top. What you’re left with is a more concentrated solution of sodium acetate. (You may notice that your solution is slightly yellowish or brownish.) * As the solution boils down‚ sodium acetate crystals will be left sticking along the inside of the pot. Don’t mix them back into the solution; you’ll need them later‚ so use a spoon to gather and save them separately. * Don’t let the film on top of your solution become thick or developed; this
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Isn’t Worth Messing With” Daly‚ Melissa. "Meth: Isn’t Worth Messing With." Current Health 2 35.1 (2008): 26-29. Health Source - Consumer Edition. Web. 28 May 2014. "I didn’t think it was a big deal‚" says Jose‚ now 17‚ of his first time trying crystal meth. When Jose was 13‚ a girlfriend offered him some‚ saying it would give him a good rush. He figured‚ why not — it would just be a one-time thing. "I’d smoked marijuana before‚ but I didn’t know how to deal with this high‚" says Jose‚ from California
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