lefttop Alfred Werner was the first Swiss citizen and also the first inorganic chemist who win the noble prize in 1913 for his coordination theory of transition metal-amine complexes. He was awarded the Noble Prize with the prize motivation state as “in recognition f his work on the linkage of atom in molecules‚ by which he has thrown fresh light on old problem and opened new field of research‚ particularly in inorganic chemistry”. Werner was born on 12 December 1866 in the French region
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CHEMICAL KINETICS RESULTS AND DISCUSSION The balanced equation of the reaction between sodium thiosulfate and Hydrochloric acid is: S2O32- (aq) + 2 H+ (aq) SO2 (g) + S (s) +H2O (l) Using beakers with the same diameter was very important in conducting the experiment. If different sizes were used‚ the visibility of the “x” on the paper beneath the beaker could disappear from view too early or too late than the hypothetical time depending on the depth of the solution. It was also significant
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Objective: To successfully separate and identify all three unknown cations‚ found in a mixture and belonging to one of two specific groups (2 from one and 1 from the other). In order to do this we will be using various tests and reactions and observing the effect they had on our solution. Materials: Pasteur pipets Bunsen Burners Stirring rods Excess reagents Hot plates Sample QA unknown 101-5.7 Table of steps and observations: Step/Test |Observation |Inference | |2-1
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constant between 18 and 14 cm‚ and then gradually decreased towards the surface. Cobalt in the exchangeable fraction increased from the bottom to 18 cm and then showed overall decrease towards the surface. Its concentration in both exchangeable and carbonate fractions was much higher between 18 and 14 cm. In the Fe-Mn oxide fraction‚ it decreased from the bottom to 8 cm followed by an increase towards the surface. Cobalt exhibited very high concentration at 8 cm in the organic phase. Chromium showed
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Restoring Balance LeChâtelier’s Principle and Equilibrium Introduction Chemical equilibrium is a true balancing act. What happens when the balance is disturbed? The purpose of this lab is to observe the effects of concentration and temperature on equilibrium and to visualize how balance can be restored based on LeChâtelier’s Principle. Background Not all chemical reactions proceed to completion‚ that is‚ to give 100% yield of products. In fact‚ most chemical reactions are reversible
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o NRX (started working in 1947) = machine built to create large quantity of radioactive material for nuclear medicine - 1951: o First cobalt cancer therapy machines (Cobalt 59 Cobalt60) as part of nuclear medicine @ UWO & USaskatchewan Hailed as “the atom bomb that saves lives” (Mcleans magazine‚ 1952) • Cobalt cancer therapy method was called “Cobalt atom bomb” even though it was only used in nuclear med o Canada helps create the International Atomic Energy Agency (IEAE) 1953: Eisenhower’s
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billions of lives in the Middle Ages. To control them‚ chemical rodenticides are used but these chemicals often destroy our environment and health‚ and may lead to death of non-targeted organisms and even human poisoning. Dumb cane contains calcium oxalate crystals that cause the poisoning. Thus it was the concern of the study to determine whether the dumb cane stem extract is effective in killing black rats. Four treatments were prepared: T1 as the commercial rodenticide (Raccumin)‚ T2 as the 100%
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10mg/dl) | Serum phosphate | 2mg (normal‚ 3.5 mg/dl) | Serum parathyroid hormone | 125pg/ml (normal‚ 10-65 pg/dl) | Serum albumin | Normal | Alkaline phosphatase | Elevated | Urinary Ca2+ | Elevated | Urinary stone composition | Calcium oxalate | Diagnosis: PRIMARY HYPERPARATHYROIDISM Primary hyperparathyroidism is a disorder of the parathyroid glands wherein people with this disorder have one or more enlarged‚ overactive parathyroid glands that secrete too much parathyroid hormone
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● Cobalt(II) Chloride Hexahydrate CoCl2.6H2O‚ was weighed in a weighing boat. The Cobalt(II) Chloride Hexahydrate was transferred into a 100mL volumetric flask dissolved in water. ● 25 mL of the dissolved was measured‚ using a graduated cylinder and few of the dissolved Cobalt (II) Chloride Hexahydrate‚ was poured into test tube. The test tube was labeled with a tape‚ to signify 25 mL and the spectrophotometer was used to record the U-V visible ABS (absorbance spectrum) with the wavelength of 515
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When I read the General Motors Misled Grieving Families on a Lethal Flaw‚ an overwhelming sadness fell upon me. I was sad that 26 families had to bury family members die to faulty equipment in the Chevrolet Cobalts. The key ethical issue is that General Motors knew that the black boxes in the Cobalts confirmed the potential fatal defect existing in hundreds of thousands of cars (Stout et al.‚ 2014). Another ethical issue was the fact that GM would tell the families of the victims that they had no knowledge
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