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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?A slightly lower result than expected is obtained in the titration of iodine with thiosulfate in the presence of CuI, the reason for this is the adsorption of iodine on the CuI solid. This problem can be solved with which of the following? A. With the formation of the partially dissolved CuSCN salt with the SCN- ion added to the environment B. The solution is boiled for 2-3 minutes and cooled C. by adding HCl solution D. By keeping it closed for 10 minutes in the darkIf you titrated this reaction to determine the moles of C2O42-, the colormetric endpoint is pink due to the Mn2+. How many moles of the oxalate (C2O42-) existed in solution if 12 mL of 0.791M permanganate was needed to hit the endpoint
- Complex-Formation Titration Show the solutionWrite all the reactions involved in the Mohr's method, if an unknown solution containing chloride ions is titrated against silver nitrate solution. Suggest an indicator and what is its colourin the unknown chloride solution ? and Why is KSCN solution used as burette solution and not in conical flask in Volhard's method?Advantages of potentiometric titrations over 'classical' visual indicator methods: (select the correct statement(s)). Can be used for colored, turbid or fluorescent analyte solution. Can be used if there is no suitable indicator or if the color change is difficult to visualize. Both answers 1 and 2 are correct
- Which of the following statement regarding EDTA titration is incorrect In back titration, excess EDTA is titrated with another standard solution of a second metal ion In normal direct titration, the color of the endpoint is from the metal-indicator complex In indirect titration, the analyte can not be titrated against EDTA In masking titration, the sample or the interference can be isolated by "masking"Five drops of dichlorofluorescein have been added to a solution containing 0.800 g sample which required 25.30 mL of 0.100 M AgNO3. (a) Identify the type of argentometric titration method used.Which of the following statement regarding EDTA titration is incorrect A. In indirect titration, the analyte can not be titrated against EDTA B. In normal direct titration, the color of the endpoint is from the metal-indicator complex C. In back titration, excess EDTA is titrated with another standard solution of a second metal ion D. In masking titration, the sample or the interference can be isolated by "masking"
- After preparing 500 mL of 0.1019 M NaOH solution, the cap is left open and it absorbs 0.652 g CO2. With this solution, Calculate the relative carbonate error in acetic acid titration besides the phenol phthalate indicator.A 25.00 ml of Ni2+ solution was diluted in HCl and treated with 25.00 ml of 0.05283 MNa2EDTA. The solution was neutralized with NaOH followed by addition of acetate buffer untilthe pH 5.5. The solution turns yellow after addition of few drops of xylenol orange indicator.Back titration using standard 0.022 MZn2+ at pH 5.5 requires 17.61 ml until end point, onwhich the solution will turn red. Calculate for the molarity of the unknown.How is the equivalence point determined in potentiometric titrations? Please explain briefly.
