In iodometry, a student forgot to add H2SO4 before the addition of KI. Is there a positive error, negative error, no effect, or error could not be determined In terms of the Amount of S2O32- used to reach starch endpoint
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In iodometry, a student forgot to add H2SO4 before the addition of KI.
Is there a positive error, negative error, no effect, or error could not be determined
In terms of the Amount of S2O32- used to reach starch endpoint
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- 1. Place 5 mL of starch solution in each of 2 test tubes. 2. Heat the test tubes to boiling and add to 1 mL of saliva, Cool and then continue heating but keep the test tube in a water bath at temperature of 60oC 3. At 5 minutes interval for 30 minutes take a drop of the reaction mixture from each test tube and test with Iodine solution (use a spot plate for the test and stir the contents of the test tube before taking a drop). Tabulate the results. 4. What would be the color of saliva extract with iodine in 3, 6, 9,12,15,and 18 minutesA 25 mL liquid bleach sample is diluted with water to 1000 mL in a bubble gel. 25 mL of the diluted sample is transferred to the flask with a pipette, excess KI is added to it, and thus OCl- ion turns into Cl- ion and I2 is formed. The released iodine is titrated with 0.09892 Na2S2O3 using the starch reagent, and 8.96 mL is required for the endpoint. Find the % NaOCl (w/v; w/v) in the bleach sample. (Na=23 g/mol, O= 16 g/mol, Cl = 35.44 g/mol) (Warning: solving the necessary reaction equations by writing is necessary to see the stoichiometric relationship)19- A 25 mL liquid bleach sample is diluted with water to 1000 mL in a bubble gel. 25 mL of the diluted sample is transferred to the flask with a pipette, excess KI is added to it, and thus OCl- ion turns into Cl- ion and I2 is formed. The released iodine is titrated with 0.09892 M Na2S2O3 using the starch reagent, and 8.96 mL is required for the endpoint. Find the % NaOCl (w/v; w/v) in the bleach sample. (Na=23 g/mol, O= 16 g/mol, Cl = 35,44 g/mol)
- A solution containing orange rind extract was analyzed using gas chromatography to measure its limonene content. The parameters used to analyze the standards and samples are listed below. Calculate the concentration of limonene in the solution in ug/mLPlace 5 mL of starch solution in a test tubes. Heat the test tubes to boiling and add 1 mL of saliva, Cool and then continue heating but keep the fthe test tube in a water bath at temperature of 40oC At 5 minutes interval for 30 minutes take a drop of the reaction mixture from each test tube and test with Iodine solution (use a spot plate for the test and stir the contents of the test tube before taking a drop). Tabulate the results. Please Answer the I badly needed this Minutes Color of Saliva Extraction with Iodine Testtube (40 degree Celcius) 3 6 9 12 15 18Enumerate the differences between a serological and a volumetric pipette and enumerate the uses, advantages, and limitations of a glass versus a plastic volumetric pipette.
- A Na2S2O3 titrant was standardized by taking 50.0 mL of 6.7863 x 10-3 M standard KIO3 solution, acidifying, and adding KI crystals. Titration of this solution required 9.80mL to reach the starch endpoint. What is the concentration of the Na2S2O3 titrant?Calculate the weight percent of ascorbic acid in a tablet of Vitamin C using correct significant figures from the following data: A 90 mg sample of a crushed Vitamin C tablet was dissolved in 40 mL of H2SO4 and 20 mL of water. Two grams of KI and 20. mL of 0.0120 M KIO3 solution was added, and the mixture titrated to a starch endpoint. The titration required 12 mL of 0.0530 M thiosulfate solution. Weight = _____ %The concentration of a culture decreases as it is serially-diluted. If you started with a culture which initially has a cell concentration of 6.0 x 108 cells/mL and you serially dilute it 1/200, 1/50, and then 2 x 10-3, what would be the concentration after each dilution?
- In the preparation of the standard curve for protein analysis, 50 mn BSA (bovine serum albumin) dissolved in H2O to a final volume of 5 mL was used as stock solution. What is the weight of BSA in 0.1 mL of stock solution? In 0.2 mL?what is electrical double layer ? how it is formed ? how many types of micelles ate there give their application. asap fast or else skipWhat are the applications of hplc?