performed at Texas State University – San Marcos in the Chemistry lab. The concentrations used in the experiment were 0.5M of sodium hydroxide and 0.5M of sodium hypochlorite. The concentrations of the solutions found in the dumpster were calculated to be .806 M (both sodium hypochlorite and sodium thiosulfate as well). This was found by taking the 6.0% (by mass) sodium hypochlorite and multiplying it by 1 gram of solution‚ 1000 mL and 1 mol NaClO. This result was then divided by the result of 100g of
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Exp.11) Identification of unknown ketones. Introduction: Given five samples of a known ketone derivative‚ the purpose of this experiment is to identify which unknown ketone derivative corresponds to the five known samples. In other words‚ using specific methods of compound detection‚ it is possible to match an unknown compound with a known compound because similar compounds will display similar characteristics. In this experiment‚ identification of the unknown ketone is accomplished through thin
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The overall objective of this experiment is to determine the mass percent of NaClO‚ sodium chloride‚ in standard bleach. The purpose of part 1‚ is to standardize Sodium Thisulfate‚ Na2S2O3‚ with the primary standard Potassium Iodate‚ KIO3. The standardized Na2S2O3 will then be used in Part 2‚ to help determine the mass percentage of sodium chloride in bleach. The chemical equation used in standardizing sodium thisulfate is‚ IO3- (aq) + 5I- (aq) + 6H+(aq) ---> 3I2 + 3H2O followed by I2 (aq) +
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is a common enzyme that is found in almost all living organisms exposed to oxygen. Hydrogen Peroxide and Sodium Hypochlorite Hydrogen peroxide is in bleaches too‚ but only the mild ones‚ which is the non-chlorine bleaches. Since only hydrogen peroxide isn’t very strong‚ other products usually use other chemicals to make the reaction and results more effective‚ for example; sodium
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presence of weak agents. Although regular re-standardization was essential for Iodine solution due to its lack of stability‚ it was still suitable for titrations due to its advantage of having sensitive and reversible indicator [5]. Reduction-oxidation titrations involving iodine were classified mainly into two; Iodimetry and Iodometry. Iodimetry was a direct method involving only one reaction between the titrant and the analyte [6]. ( )( ( ) )( ( ( ) ) ) In Reaction
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www.kalvisolai.com 5 Mark Compulsory Problems with Solution 1 +2 CHEMISTRY Q. 70 Compulsory Problems with Solution Problems are solved in easiest way (As per Government Answer Key) www.kalvisolai.com 5 Mark Compulsory Problems with Solution 2 SALIENT FEATURES Dear Students ❆ Q.No: 70 is asked as compulsory problem in Govt Exam. ❆ Two problems to be answered out of four problems. ❆ To simplify the problem‚ hints and expected compounds related to molecular formula‚ general formula are
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difference between mineral oil and water using a hand lens. * Making iodine in water- We added one drop of potassium iodide and sodium hypochlorite (bleach) then mixed the two together producing iodine. * Making iodine in oil-We added two drops of mineral oil‚ one drop of water on the mineral oil‚ then added one drop of potassium iodide and sodium hypochlorite. Producing Iodine. Results: In class we conducted four experiments on
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Paragraph 1 In experiment 2‚ the statistical analysis of data collected showed that Clorox Household Cleaner was not significantly different than the Clorox Toilet Bowl cleaner. This is due to the fact our calculated P-value was 11.45%‚ which is larger than the 5% maximum allowed to us to be able to support the alternative hypothesis. This indicates there was not support for our alternative hypothesis‚ causing us to reject it. In doing so‚ we had to accept our null hypothesis. Our Null hypothesis
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Cooling Water Problems and Solutions Course No: M05-009 Credit: 5 PDH A. Bhatia Continuing Education and Development‚ Inc. 9 Greyridge Farm Court Stony Point‚ NY 10980 P: (877) 322-5800 F: (877) 322-4774 info@cedengineering.com COOLING WATER PROBLEMS AND SOLUTIONS Water is used in cooling systems as a heat transfer medium and frequently also as the final point to reject heat into the atmosphere by evaporating inside cooling towers. Depending on the quality of available fresh
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minute concentrations (parts per billion) of the pollutant nitrogen dioxide in air. Luminol is also used frequently in laboratory demonstrations of the chemiluminescence phenomenon. Luminol-mediated chemiluminescence is the result of an oxidation reaction. The oxidation proceeds in two steps‚ which ultimately lead to the production of the aminophthalate anion in an excited state and the elimination of water and molecular nitrogen. The formation of the strong triple bond (N≡N) is a major factor in the
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