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involves some important laboratory techniques‚ when carrying out a synthesis reaction. When solutions of potassium iodide and lead (II) nitrate are mixed together crystals of lead iodide are formed according to the following chemical equation: 2 KI (aq) + Pb(NO3)2 (aq) → PbI2 (s) + 2 KNO3 (aq) Procedure: Lead compounds are toxic. If you get any of the solution or solid on your hands‚ wash your hands immediately. Clean
Free Stoichiometry Chemical reaction Chemistry
solution. Hypothesis: If the halide ions react‚ then the production of precipitate and complex ions will be recognizable. Materials: * * 24-well microplate * AgNO3‚ 0.1 M * Ca(NO3)2‚ 0.5 M * Gloves * KBr‚ 0.2 M * KI‚ 0.2 M * Lab apron * Na2S2O3‚ 0.2 M * NaCl‚ 0.1 M * NaF‚ 0.1 M * NaOCl (commercial bleach)‚ 5% * NH3(aq)‚ 4 M * Safety goggles * Starch solution‚ 3% * Thin-stemmed pipets (12) Procedure: 1.) Put on safety goggles
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immediately after contact. Homogeneous| E.|Blue dye + NaOCl||Stays blue. Homogeneous| | with the 1 drop of HCl||Mixes and turns a bluish green color. Homogeneous| F.|NaOCl + KI||Slightly yellowish tint to the solution. Homogeneous| | with 1 drop of starch||Turned the slim yellow into a slight brown tint. Homogeneous| G.|KI + Pb(NO3)2||Turns yellow immediately after contact with little yellow powdery chunks. Heterogeneous| H.|NaOH + phenolphthalein||Turns a dark pink/purple and expands. Homogeneous|
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prepared directly by dissolving iodine in water because iodine is too volatile so it is almost impossible to avoid loss while the solution is being prepared. Therefore iodine is prepared in situ by mixing pure potassium iodate (KIO3 ) and potassium iodide (KI) in acidified medium. IO3- + 5I- + 6H+ → 3I2 + 3H2O The excess iodine that has not reacted with ascorbic acid in fruit juices (vitamin C) is then back titrated by standardized sodium thiosulphate solution. Iodine can be decolourized
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and Discussion Principle behind the experimental design Results are tabulated and with table number and title Graph‚ Drawings (Figure # and Title) Conclusion Recommendation Experimental 1.0 A. Reagents - Anhydrous ZnCl2 - 6M H2SO4 - 10% KI - 6M NaOH - 10% K2Cr2O7 - conc. HCl - DNPH reagent (potential carcinogen!) - unknown sample B. Materials - Small test tube - Hot Plate - 250 mL beaker - Pasteur Pipettes 2.0 Procedures Chemical Analysis was done for
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toys. It was unfortunate for the workers‚ but OAC had to make a decision because they could not find a better way to stay completive and lower cost. Assuming that the NYT reporting was accurate‚ is it ethical for the OAC to continue working with Kin Ki? Yes‚ I believe the only way for OAC to keep working with the company is to make sure the
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STATEMENT OF PURPOSE FOR MS IN ELECTRICAL ENGINEERING Life has always been a smooth flowing brook with small dashes here and there. It has certainly reached a critical juncture when I have to desire where to turn and what to do next and my idea of life can be best quoted by this very famous quotation: “Life is like riding a bicycle. To keep your balance‚ you must keep moving.”
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Table of Contents Veer Savarkar Introduction Vinayak Damodar Savarkar‚ commonly know as Swantantryaveer Savarkar was a fearless freedom fighter‚ social reformer‚ writer dramatist‚ poet‚ historian‚ poltical leader and philosopher. He remains largely unknown to the masses because of the vicious propaganda against him and misunderstanding around him that has been created over several decades. Veer Savarkar was born on the 28th of May 1883 in a village called Bhagoor near Nasik in Maharashtra
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Whether any prosecution detention fine conviction sentence against you has been awarded by any court of law for any offence? If yes‚ particulars of the same other details whether desirous of taking pre-exam training only for SC St religious minority communities ex- servicemen if yes‚ Centre for training languages known read write speak HINDI ENGLISH YES declaration I hereby declare that all statements made in this application are true‚ complete and correct to the best of my knowledge and belief.
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