the glass closer to the side of the heavier substance (HCl‚ M = 36.4611 g/mole; dAve = 10.8 cm). The agar-water gel set up was composed of a petri dish of agar-water gel containing three wells. Drops of potassium permanganate (KMnO4)‚ potassium dichromate (K2Cr2O7) and methylene blue were simultaneously introduced to each well. Methylene blue‚ having the largest molecular weight‚ displayed the smallest diameter (18 mm) and diffused at the slowest rate (0.3668 mm/min.). Thus‚ the higher the molecular
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electrons an atom has and to determine where these atoms will go during a redox reaction‚ we can use oxidation numbers to determine this. The following guidelines can be used to determine the oxidation state of an atom or molecule. 1) Atoms in their pure elemental state (neutral) will have an oxidation number of zero‚ this is because the element has neither been oxidized or reduced. 2) The sum of the oxidation state of all atoms in an ion is equal the charge on the ion. The ionic charge of an atom can
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electrodes. To understand electrolysis‚ you need to know what an ionic substance is. Ionic substances form when a metal reacts with a non-metal. They contain charged particles called ions. For example‚ sodium chloride forms when sodium reacts with chlorine. It contains positively charged sodium ions and negatively charged chloride ions. Ionic substances can be broken down by electricity. Electrolysis is the process by which ionic substances are decomposed (broken down) into simpler substances when
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Potassium Permanganate‚ Potassium Dichromate‚ and Methylene Blue.1 Arantxa Alex Carpio Group 1 Sec. X – 4L March 24‚ 2015 ABSTRACT The effect of molecular weight and time on the rate of diffusion was determined using the agar-water gel test. A petri dish of agar-water gel with three wells was prepared and a prepared solution of each substance was dropped on each well; one with potassium permanganate (KMnO4)‚ the other with potassium dichromate (K2Cr2O7)‚ and the last one with
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Environmental Chemistry and Analysis Prof. M.S.Subramanian MODULE 1.5 Advanced Waste Water Treatment Removal Of Suspended Solids Microstraining Coagulation and flocculation Filtration Removal of dissolved solids Ion exchange Reverse osmosis Electrodialysis Removal of nitrogen Phosphate removal (chemical treatment) Phosphate removal (biological treatment) Removal of dissolved organic compounds Adsorption Sludge treatment and disposal Disinfection 1 2 2 3 3 4 6 7 8 9 10 10 10 11 13 Indian
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So long‚ Gummy Bears! [pic] This demonstration illustrates the vast amount of energy which is available from the oxidation of carbohydrates‚ such as sugar. An excess of oxygen‚ generated by the decomposition of potassium chlorate‚ will react with the glucose in a gummy bear‚ releasing a large amount of energy quickly and dramatically. Introduction: Sugar is a fuel that we use for energy. We can also use it to fuel a chemical reaction. In this reaction‚ the sugar from the gummy bear
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Khoa Kirk Hoang OCHEM 262 Lab: Exp 35- Oxidation + Reduction Tablular Data Pre-Weighted Flask | Product + Flask | Product | % Yield | 5.36g | 5.401g | 0.041g | 41% | (60-70% = Acceptable) Actual Melting Point | Experimental Melting Point | 212C | 199.8 | ------------------------------------------------- (10C-15C variations acceptable) Reasons %yield: A reason that our percent yield is lower then what is acceptable can be due to various reasons. First‚ the amount of product we
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chlorides‚ strong oxidizing agents. Highly flammable. Toxicology-Harmful if swallowed or inhaled. Severe irritant. Vesicant. Personal Protection-Safety glasses. Lead‚ Pb(s) Stability-Stable. Incompatible with strong oxidizing agents‚ potassium‚ sodium. Toxicology-Toxic by ingestion or inhalation. Chronic poison. Personal Protection-Solid lead is believed to present a relatively low hazard to health‚ but it is a cumulative poison‚ and can cause serious harm if inhaled as a powder‚ or ingested
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E20-1 Experiment 20 Consumer Chemistry: Vitamin C in Fruit Juices The Task The goal of this experiment is to determine the concentration of vitamin C in a range of different fruit juices (fresh and preserved) using titration and to rank these sources of vitamin C. Skills At the end of the laboratory session you should be able to: * use a pipette correctly‚ * use a pipette filler safely‚ * manipulate a burette and carry out a quantitative titration properly‚ * weigh a sample
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available in the blood. Sources: egg‚ soya beans‚ cod-liver oil‚ sunlight Deficiency: Osteomalacia (softening of the bone)‚ rickets (softening of the bone) Vitamins E (TOCOPHEROL) FUNCTION: Fat soluble anti-oxidant.It protect other substances from oxidation by being oxidized itself. Tocopherol is the most active and abundant one. Vit E as an antioxidant. SOURCES: CORN‚ NUTS‚OLIVES‚GREEN LEAFY VEGETABLES DEFICEINCY: Mild hemolytic anemia VITAMINS K • FUNCTION: anti-sterity ‚ BLOOD CLOTHING
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