11.Residual EDTA titrations are employed in the analysis of Bi and ________ containing compounds. 12.The equilibrium constant that drives complexation reactions to completion is known as?
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11.Residual EDTA titrations are employed in the analysis of Bi and ________ containing compounds.
12.The equilibrium constant that drives complexation reactions to completion is known as?
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- 17. This type of analysis implies that the constituent determined was present in very, very low concentration. a. Macro analysis b. Semi-macro analysis c. Micro analysis 18. Which of the following does not happen during digestion? The crystals dissolve and re-precipitate under equilibrium conditions. b. Weakly bound water are lost from the precipitates. c. Filterability improves d. None of the choicesA silver nitrate soluti on contains 14.77 g of primary standard AGNO3 , in 1.00 L what volume of this solution is needed toreact completely with 50.00 ml. of 0.01808 M Na2S. 1. O10.40 ml. 2. O 20.79 ml. 6.10 ml. 4. O12.31 ml. 5. O18.21 ml. 3.3. A 100 mL sample of hard water is titrated with 22.4 mL of the EDTA solution from problem 2. The same amount of MgCl, is added as previously and the total volume of EDTA solution required is 22.44 mL. moles b) How many moles of EDTA are there in that volume?
- Which rapid and quantitative analysis requires a sample solution of metal ion to be titrated against a standard solution of EDTA, in the presence of a buffer?* Alkalimetric Replacement Back Titration Direct Which agent is added into a solution if direct titration is deemed to proceed slowly?* Indicator Titrant Catalyst Demasking agent Which method uses an excess solution of EDTA added to a sample and then pH is adjusted for back titration with a metal ion solution?* Replacement Residual Alkalimetric Direct Which reagent will form a more stable complex with interfering ions rather than the with the indicator and EDTA?* Masking agents Demasking agents Chelating agents Complex agents Which of the following contains a set of incorrectly paired words?* Chelatometry - Complexation / Precipitimetry - Argentometric…Comparing the two quantities based on the given condition, which is greater I or II? or are they equal? can the quantities be measured? Consider the analysis of Fe in ore using permanganate as titrant. Under the same acidic conditions I. % Fe with pre-reduction II. % Fe without pre-reductionWhich of the following is most suitable for filtering the crystalline precipitate BaSO4 out of the precipitating medium? a. Buchner funnel b. Gooch crucible c. Ashless filter paper d. Sintered glass crucible
- 8. The process by which a diverse ion gets trapped by a growing precipitate particle but does not become part of the crystal lattice A. occlusion В. adsorption C. post-precipitation D. inclusionIn order to adjust the Potassium Permanganate solution, 0.0544g Na2C2O4 was taken and necessary experimental procedures were performed on it and the titrant consumption was found to be 7.9 mL. What is the KMnO4 concentration? A. 0.040B. 0.044C. 0.021D. 0.0270.2 g of iron wire is dissolved in acid and then reduction is done using ............... solution. The Fe2+ ion in the obtained solution is titrated to the 0.1 M Ce4+ standard solution. Which of the following is not suitable for the blank above? A. Walden reductant B. Sodium bismuthate C. Tin(II) chloride D. Jones reductive
- 2. After a certain amount is taken from a sample containing 5% (w/w) NaCl, it is dissolved by the addition of water and analyzed according to the Volhard method. Into this solution, 50 ml of 0.1M AgNO; solution is added. Then, the unreacted AgNO, is back titrated with 0.2 M NH4SCN solution. If 7.9 ml of NH SCN solution was consumed in this titration, what is the amount that was taken from the sample? (NaCl:58.5 g/mol)What is the expected visual observation when ether and hot, acidic potassium permanganate were mixed in a test tube? a. Formation of brown precipitate and disappearance of purple colorb. The purple color of potassium permanganate remains its purple color.c. Evolution of gas, formation of brown precipitate and disappearance of purple colorFor all metal ion - EDTA complxes, what is the relationship between the conditional formation constant Kf' and the normal formation constant, Kf ? -The conditional formation constant is always less than or equal to Kf at all pHs.. -The conditional formation constant is usually less than Kf, but can sometimes be greater than Kf for some metal ions at high pHs. -The conditional formation constant is always less than Kf at all pHs.. -There are no restrictions. Depending on the metal ion and the pH, the conditional formation constant can be less than, equal to, or greater than Kf.