Name: Jeanne Yoo|Date: 07/15/13| Exp 1: Observations of Chemical Changes|Lab Section: 1411-76426| Data Tables: Part 1: |Chemicals|Well No.|Observations of the Reaction| A.|NaHCO3 + HCl|1 |clear bubbles formed| B.|HCl + BTB|2 |turned orange after BTB was added‚ transparent‚ acidic| C.|NH3 + BTB|3 |turned dark blue after BTB was added‚ opaque‚ basic| D.|HCl + blue dye| |blue dye was missing from kit| E.|Blue dye + NaOCl| |blue dye was missing from kit| | with the 1 drop of HCl| ||
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Intensive Care Nursery House Staff Manual Inborn Errors of Metabolism INTRODUCTION and PATHOPHYSIOLOGY: Inborn Errors of Metabolism (IEM) comprise a group of disorders in which a single gene defect causes a clinically significant block in a metabolic pathway resulting either in accumulation of substrate behind the block or deficiency of the product. All IEMs are all genetically transmitted typically in an autosomal recessive or X-linked recessive fashion. The major categories are: Organic
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large-scale industrial fixation of nitrogen through the Haber process‚ a major source of Potassium nitrate was the deposits crystallising from cave walls or the drainings of decomposing organic material. Dung-heaps were a particularly common source: ammonia from the decomposition of urea and other nitrogenous materials would undergo bacterial oxidation to produce nitrate. It was and is also used as a component in some fertilizers. When used by itself as a fertilizer‚ it has an NPK rating of 13-0-44 (indicating
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ammonium nitrate? 9. How many moles are in 56.2 grams of bromine gas? 10. What is the mass of 2.67 moles of sulfuric acid? 11. What is the mass of 3.5 moles of sodium sulfide? 12. Calculate the mass of 0.354 moles of ammonia‚ NH3. 13. Calculate the mass of 3.54 moles of sodium chloride. 14. Calculate the number of molecules of H2S in 68.0 g of hydrogen sulfate. 15. How many moles are found in 50.0 g of calcium citrate? 16. Determine the
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1. (a)Correct the following statements. (i) The melting points of crystalline and amorphous solids are not definite. The melting point of an amorphous solid is not definite. OR The melting point of a crystalline solid is definite. P Ps X solute . Ps P Ps The equation for relative lowering of vapour pressure when solute remains normal is X solute P (iii)The degree of ionization decreases with dilution. The degree of ionisation increases with dilution. (iv) Tertiary butyl halide
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Metabolism produces a number of toxic by-products‚ particularly the nitrogenous wastes that result from the breakdown of proteins and nucleic acids. Amino (NH2) groups are the result of such metabolic reactions and can be toxic if ammonia (NH3) is formed from them. Ammonia tends to raise the pH of bodily fluids and interfere with membrane transport functions. To avoid this the amino groups are converted into urea‚ which is less toxic and can be transported and stored to be released by the excretory
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RESULTS: Solution | pH Value | Aniline | 7 | Benzyl aniline | 12 | Diethylamine | 10 | Table 1: Basicity of Amines Solution | Odor of Solution | Aniline added with chloroform and alcoholic KOH | Unpleasant smell | Table 2: Carbylamine Test (odor of solution) Solution | Observations | Aniline added with concentrated H2SO4 | -Salt formation upon addition of sulfuric acid- Gelatinous‚ pale yellow solution | Table 3: Salt Formation Solution: | Residue Formation: | pH level:
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Discussion for Experiment 1 (Basic Laboratory Operations and Identification of a compound : Chemical Properties) In the first experiment‚ the precision of instrument was studied by measuring the mass of water for several times. The result shows that the mass measurement of the balance is precise since the masses of water in six trials are somewhat close. The reason that the masses of water in each trial are not identical may come from the high sensitivity of the balance that keep fluctuating due
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Last Name ____________________First Name _______________________ Ignore: 5‚ 7‚ 19‚ 30 1. | How many grams of CaCl2 (molar mass = 111.0 g/mol) are needed to prepare 4.44 L of 0.500 M CaCl2 solution? | | A) 369 g B) 271 g C) 258 g D) 296 g E) 246 g | 2. | An aqueous solution of ammonium sulfate is allowed to react with an aqueous solution of lead(II) nitrate.The complete ionic equation contains which of the following species (when balanced in standard form)? | | A)
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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Ordinary Level 5070/31 CHEMISTRY Paper 3 Practical Test October/November 2010 CONFIDENTIAL INSTRUCTIONS *4711088250* Great care should be taken to ensure that any confidential information given does not reach the candidates either directly or indirectly. The Supervisor’s attention is drawn to the form on page 7 which must be completed and returned with the scripts. If you have any problems
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