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Enumerate the ions that form colored complexes during the confirmatory test. Identify their characteristic colors.
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- Enumerate the ions that form colored complexes during the confirmatory test. Identify their characteristic colors. attached below is the picture of the experimentGroup III Cation Analysis Enumerate the ions that form colored complexes during the confirmatory test. Identify their characteristic colors. Chemical Formula of the Complex Ion Characteristic ColorElaborate the reason why EDTA is used in many complexometric titrations. How will you be able to improve its selectivity when it comes to analyzing specific metals?
- What weight of sample must be taken so that each 50 mg BaCl2 obtained in a gravimetric silver determination shall correspond to 10% of the Cl in the original sample? BaCl2 (208.23) Cl (35.45)Most iron (III) compounds are very weakly colored, and do not lend themselves well to visible spectrometric analysis. What is one possible reliable way to improve the analysis? Group of answer choices: Find a different way to analyze the sample Use a larger sample Complex the iron with another chemical to increase its absorbance Analyze something elseCalculate the hardness in terms of parts per million calcium carbonate (100.0869 g/mol) in a 50.00 mL aliquot of milk sample. The sample was treated with a small amount of ammonia buffer to bring the pH to 10 followed by the addition of 10 drops EBT indicator. The milk sample required 10.00 mL of 8.000 x 10-3 M EDTA for titration. 160 ppm 4 80 320
- What is the purpose of an auxiliary complexing agent?Assess the validity of each statement and choose X if the statement is CORRECT, Choose Y if otherwise. 10. Potentiometric methods can be used for end-point detection in EDTA titration of metal ions for which ion electrodes are available 11. Back titrations are useful for determining cations that are able to form stable EDTA complexes. 12. Nitriloacetic acid is an aminopolycarboxylic acid. 13. A ligand that has a single donor group is unidentate such as glycine. 14. Ammonia is a bidentate ligand. 15. The term chelate is derived from a Greek word meaning, toothlike projections1. Briefly explain why the AgCl produced in a gravimetric silver determination is inherently purer than the AgCl produced in a gravimetric chloride determination?
- Most iron (III) compounds are very weakly colored, and do not lend themselves well to visible spectrometric analysis. What is one possible reliable way to improve the analysis? Find a different way to analyze the sample Use a larger sample Complex the iron with another chemical to increase its absorbance Analyze something elseDetermine the equilibrium concentration of [FeSCN]2+ in each test tube y = 6170.7x - 0.0153 Solution 0.002M iron(III) nitrate in 1M nitric acid(mL) 0.002M potassium thiocyanate(mL) DI water(mL) Absorbance(A) 1 3 2 1 0.128 2 2 3 1 0.269An auxiliary competing agent is used in EDTA titrations to slow down the titration. keep some interfering component of the analyte mixture from complexing with the EDTA. speed up the titration. keep the metal ion from precipitating out of the solution.