Stoichiometry II- Synthesis of a Coordination Compound Report 〖CuSO〗_4 (s)→〖Cu〗^(2+) (aq)+ SO_4 (aq)^(2-) Cu^(2+) (aq)+ 4NH_3 (aq)→[Cu(NH_3 )_4 ]^(2+) [Cu(NH_3 )_4 ]^(2+)+ SO_4 (aq)^(2-)+H_2 O□(→┴(methanol solvent) ) [Cu(NH_3 )_4 ]SO_4*H_2 O 1.992 g 〖CuSO〗_4 (s) × (1 mol〖 CuSO〗_4 )/(159.6 g) = .0124 mol 〖CuSO〗_4 (s) .0124 mol 〖CuSO〗_4 (s)×(1 mol [Cu(NH_3 )_4 ]SO_4*H_2 O )/(1 mol〖 CuSO〗_4 )×(245.74 g [Cu(NH_3 )_4 ]SO_4*H_2 O )/(1 mol [Cu(NH_3 )_4 ]SO_4*H_2 O )=3.047 g [Cu(NH_3 )_4 ]SO_4*H_2
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6. FIRST DERIVATIVE ZERO CROSSING METHOD 6.1. ABSTRACT: Simple‚ specific‚ accurate and precise 1st order derivative zero-crossing spectroscopic method was developed for simultaneous determination of PHENYLEPHRINE and EBASTINE from their binary mixture. In this 1st derivative zero-crossing spectroscopic method the amplitudes of the 1st order derivative of the spectra of the binary mixture containing PHE and EBS were measured at 252.2 nm (zero crossing of EBS) for determination of PHE and at 274.8
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content of fibre‚ major elemental ions and other useful minerals. GCMS and XRF studies on the gum also revealed that the gum has several industrially useful minerals. The viscosity of the gum is found to be significantly affected by concentration‚ temperature‚ pH and concentration of electrolyte. Calculated value of intrinsic viscosity from Kraemer and Huggins plots were 4.67 to 8.57 dl/g while those obtained from Tanglertpaibul
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Unit 1 Key Questions Lesson 1 1. One argument against continuing research on the atom is that the cost continues to increase at an alarming rate‚ and the benefits seem to be declining. Whereas quantum chemistry experiments as early as 80 years ago were very cheap and yielded considerable practical results‚ now very few if any practical results are emerging‚ but the costs of experiments continues to increase. On the other hand
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opaque HCl – liquid‚ transparent‚ colourless‚ low viscosity‚ odourless Test tube felt warm bubbles 2 Burning splint placed near mouth of test tube Mg ribbon disappearing Liquid is still colourless and clear Bubbles still rising through liquid. “pop” sound when burning splint placed near mouth of test tube 3 Copper (II) sulfate (CuSO4) added to water CuSO4 – solid‚ blue‚ powder‚ odourless‚ opaque Water – liquid‚ colourless‚ transparent‚ low viscosity‚ odourless CuSO4 dissolved in the water and created
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benzocaine. The remainder of the sample was placed into a 250ml beaker for recrystallization. Methanol and deionized water were added dropwise while solution was heated on a heating plate. Methanol was added until the product was dissolved. It was removed from the heating plate and allowed to cool to room temperature. It was then placed into an ice bath. Due to the size of the beaker opening the methanol
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Observations: - The colour of the flame when burning with different alcohols. - Methanol was a blue coloured flame which was slightly orange at the top of the flame. This is because there is a high amount of complete combustion and the carbon atoms are not becoming a waste product. - Ethanol burnt with a blue flame that was a more intense bright orange colour towards the top of the flame and more orange flame than methanol. - Propanol burnt a small amount of blue at the base of the flame but
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best solvent to use. Also is the analysis of mixtures before‚ during and separation. Possible solvents: Hexane MW- 86.17 g/mol Hazards-flammable‚ harmful if swallowed Melting pt / boiling pt (degree Celsius) - 69 Density-.6548 g/ml [pic] Methanol MW-32.04 g/mol Hazards- flammable‚ eye irritant Melting pt / boiling pt- 65 Density-.7918 g/ml [pic] Methylene chloride [pic] MW- 84.93 g/mol Hazards- toxic if inhaled Melting pt / boiling pt- 39.6 Density-1.33g/ml Possible Components
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proper interaction between substances. Then it is cooled again to precipitate the product and separate it from some of the impurities. For further purification the product is recrystallized. A solubility test was performed on water‚ acetone‚ and methanol to pick a solvent for this process. For a substance to be optimal for recrystallization‚ the product has to be insoluble at room temperature and soluble at the solvent’s boiling point1. The selected solvent will allow everything to dissolve at its
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formalin. The commercially available formalin has 10 to 12% methanol with a few impurities like aluminum and copper. Almost 21 million tonnes of formaldehyde is produced annually all around the world. Synthesis of Formaldehyde Formaldehyde is produced by catalytic oxidation of methanol. A mixture of molybdenum and iron or silver is used as a catalyst in such a reaction. But a more commonly used process is FORMAX. In this process‚ methanol and oxygen react at temperatures more than 250ºC in presence
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