is used to precipitate the chloride ions in the unknown‚ which can be measured to determine the percent composition of chloride in the unknown. The results from these three major analyses helped to draw the conclusion that the unknown is in fact [Co(NH3)6]Cl3. -2.0 Synthesis/Analysis of Cobalt-Amine-Halide Compund (Procedure 1‚ pgs 16-7)) A cobalt (III) amine halide compound was prepared by making a solution of cobalt (II) chloride hexahydrate and ammonium chloride (NH4Cl) to liberate the Co (II)
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suitable for distinguishing between the nitro- and nitrito-linkage isomers because they have different vibrational patterns from one another. Given enough time‚ the more stable thermodynamic linkage isomer [Co(NH3)5NO2]Cl2 will be formed as the major product over the kinetic product‚ [Co(NH3)5ONO]Cl2. Introduction The ultraviolet-visible (UV/Vis) spectrum of cobalt complexes has been analyzed to determine the fundamental differences in the structures of each molecule.1 Ligands can coordinate to
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1.1: Thesis outline Purines breakdown by the body will form a chemical called uric acid. Uric acid mostly can be found in foods and drinks like dried been and pears. Normally‚ most of the uric acid dissolves in blood and move from blood to the kidneys. High level uric acid kidney or blood caused some bad effect such as leukemia‚ hyperuricemic and lymphoma. Therefore‚ the electrochemical method (graphene oxide modified glassy carbon electrode method) are introduced to detect the uric acid in human
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Compare and Contrast Lesson Plan: Part One and Two Introduction to Topic and Guided Practice. Materials Needed- A granola bar and a candy bar; and/or a one dollar bill and a quarter‚ Venn Diagram worksheet Compare and Contrast lesson plan activity time: 30-120 minutes‚ depending on use of optional reinforcement and advanced exercises. If all sections are used‚ lesson can be divided into multiple‚ separate sessions if desired. Objective of Compare and Contrast lesson plan:
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experimental method produces more accurate result. One was electrochemistry using a Daniel cell and the other one was spectrometry by estimating concentration of complex solution using a calibration curve. The formation constant of cupric ammine complex Cu(NH3)42+‚ Kf‚ came out with 1.93x10^15 using electrochemical cell method and 9.79x10^12 using spectrophotometer method. Considering the literature value of Kf is around 4.8x10^12 ~ 1.7x10^13‚ spectrophotometer gives more accurate result than electrochemical
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silver and ammonia: + Ag + 2NH3 A g(NH3 )2 + Kf = 1 .5 x 10 7 where Kf i s the formation constant (always >1 ‚ formation of the complex is highly favorable) Complex ion formation increases the solubility of sol ids in water. Example: Calculate the solubility of AgCl (1.6 x 10 + -10 ) in 1.0 M NH3 . AgCl A g + Cl - Ksp = 1.6 x 10 Ag + 2NH3 A g(NH3 )2 + Kf = 1 .5 x 10 + + AgCl + 2NH3 Ag(NH3 )2 + Cl - K = 2 .4 x 10 -10 7
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Sample Questions 1. In the chemical formula for ammonia‚ NH3‚ what does the subscript 3 represent? (a) the number of ammonia molecules that will bond together (b) the number of nitrogen atoms in each molecule of ammonia (c) the number of nitrogen and hydrogen atoms in each molecule of ammonia (d) The number of hydrogen atoms in each molecule of ammonia 2. The diagram above shows a block from the periodic table. The number six represents the following consumers eats only producers? (a) atomic
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QUANTITATIVE DETERMINATION OF COPPER (II) CONCENTRATION BY SPECTROPHOTOMETRY D.DEL PRADO1‚ J. BELANO1‚ M.MAHUSAY2‚and M.FRANCISCO2 1 DEPARTMENT OF FOOD SCIENCE AND NUTRITION‚ COLLEGE OF HOME ECONOMICS 2INSTITUTE OF CHEMISTRY‚ COLLEGE OF SCIENCE UNIVERSITY OF THE PHLIPPINES‚ DILIMAN‚ QUEZON CITY 1101‚ PHILIPPINES DATE SUBMITTED: 12 MARCH 2013 DATE PERFORMED: 7 MARCH 2013 ------------------------------------------------- ------------------------------------------------- ABSTRACT -------------------------------------------------
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Professor Nieter Science Inquiry: Geoscience Introduction Astrobiology is the area of study dealing with alien life‚ the likelihood of finding it‚ where it might be found‚ how it evolved‚ its morphology‚ its culture‚ etc. It’s a huge field that overlaps all the sciences but especially the geosciences‚ evolutionary biology‚ chemistry and bio-chemistry and astronomy. In the following report I focus on astrobiology as it applies to geology‚ or what kinds of planets‚ stars and solar systems are the
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Solubility Product Constants and Complex Ion Equilibria → Ag + + 2 NH Ag(NH3 ) +2 ← 3 [Ag ][NH ] = [Ag(NH ) ] 2 + Kd 3 + 3 2 → Cu 2+ + 4 NH Cu(NH 3 ) 24+ ← 3 [Cu ][NH ] = [Cu(NH ) ] 4 2+ Kd Complex Ion Equilibria 3 2+ 3 4 3 Complex Ion Equilibria • A metal ion coordinated to several neutral molecules or anions forms compounds called complex ions. • Familiar examples of complex ions include: • • Ag(NH3 )+2 Cu(NH3 )+4 Complex ion equilibrium constants are called dissociation constants
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