OF DISSOLVED OXYGEN CONTENT BY WINKLER REDOX TITRATION A. Standardization of Thiosulfate Solution Primary Standard used: KIO3 Formula Mass of Primary Standard: 214.0010 g/mol %Purity: 99.9% Formula Mass of KI: 166.00277 g/mol %Purity of KI: 99.9% Trial 1 2 3 KIO3 weight‚ g 0.1459 0.1458 0.1459 KI weight‚ g 1.0033 0.9857 1.0100 Volume of Na2S2O3‚ ml Final Volume‚ ml 22.6 25.5 22.9 Initial Volume‚ ml 0.0 0.0 0.0 Net volume‚ ml 22.6 25.5 22.9 B. Sample Analysis Volume of Sample: 400 ml Volume of sample
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clear blue with the 1 drop of HCl green/blue F. NaOCl + KI A2 rusty-yellow with 1 drop of starch black G. KI + Pb(NO3)2 B2 yellow‚ not clear H. NaOH + phenolphthalein A3 purple‚ violet I. HCl + phenolphthalein A4 clear J. NaOH + AgNO3 D3 murkey‚ brown K. AgNO3 + NH3 A4 purple‚ then cloudy white/clear after exposure to bright light pink tint L. NH3 and CuSO4 A5 cloudy dark blue Part F: Testing of Various Foods with the NaOCl + KI solution Foods Presence or Absence of Starch potato yes
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Test Centre Address Nearest NSE branch office for submission of forms and test fees Assistance Ahmedabad-NSE.iT 401‚ Saffire Complex‚ 4th Floor‚ C.G Road‚ Opp Times Square‚ Near Bodyline Char Raasta‚ Ahmedabad – 380019 201‚ Taksh Classic‚ Vasna Road‚ Off Old Padra Road‚ Baroda - 390007‚ Gujarat Landmark: Opp. Big 92.7 Fm Office Baroda-NSE.iT No.1508‚ Center Point‚ Office No. 202‚ 2nd Floor‚ Ghogha Circle‚ Bhavnagar 364001 NSEIT Limited‚ Office No: 430‚ 4th floor‚ Soft Tower-1
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The Iodine Clock Investigation Introduction This is an investigation into the rate of a reaction and the factors that contribute to how fast a reaction will take place. Through the recording and analysis of raw data‚ this investigation also allows us to apply generally accepted scientific rules and to test them against results gained from accurate experimental procedures. Aim The aim of this experiment is to investigate the rate at which iodine is formed when the concentration
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I. Title: Analysis of a Commercial Bleach II. Purpose: III. Materials: Commercial bleach‚ 5% NaClO. (5 mL). Hydrochloric acid (HCl)‚ 3M. (6 mL). Potassium Iodide (KI). (6 g). Sodium thiosulfate solution (Na2S2O3)‚ 0.100 M. (70 mL). Starch solution 2%. (3 mL). Safety goggles Apron Digital scale Buret Buret clamp Erlenmeyer flask Pipet bulb Ring stand Ttransfer pipet‚ 5 mL and 25 mL Volumetric flask‚ 100 mL Stopper Wash bottle Distilled water Weigh boat Beakers‚ IV. Procedures:
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nothing seriously‚ all he likes to do is eat and train. The only time to take things seriously is when he is battling. When it comes to battling‚ he is very strategic. In the Dragon Ball Z universe people are able to use Ki. Ki is the force that’s forms of any living thing. Goku uses Ki to perform destructive‚ and powerful attacks. He has an arsenal of
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development of the world without improving our English language. For example‚ the Minister Mentor of Singapore‚ Lee Kuan Yew states that SHANG HAI have the potential to be the biggest financial city in the world. However‚ it needs the support of all the world top financier‚ lawyer and accountant to make it the biggest financial centre instead of HONG KONG. Thus‚ SHANG HAI needs a group people who had mastered in English. So that it can contribute an English environment to combine with other financial centre
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