A 100.0 mL sample of drinking water was buffered at pH 10.0 and, after addition of Calmagite indicator, required 38.11 mL of 4.652 x 10-2 M EDTA for titration. Calculate the total hardness of the water as (a) ppm CaCO3 and (b) ppm CaO
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- In order to adjust the EDTA solution, 10 mL of 0.01M Ca + 2 sample was taken and 10 mL of pH 10 buffer was added on it and it was completed to 100 mL. Then, two drops of EBT indicator were added and titrated with EDTA. Since the consumption is 13 mL, what is the concentration of EDTA solution in terms of molarity?2) A 100.0 mL sample of drinking water was treated with ammonia buffer and after addition of Eriochrome Black T indicator, required 18.0 mL of 0.00559 M EDTA for titration. (a) Identify the role of ammonia buffer in the analysis. (b) Identify the indicator and endpoint color. (c) Calculate the total hardness of the water sample as ppm CaCOTitration of 25.0 mL of a 0.0500 M Zn2+ solution with 0.0550 M EDTA in a solution buffered at pH 8. Assume that the temperature is 25 oC and that the formation constant for Zn2+ is 3.13 x 1016 at this temperature. What is the conditional formation constant for Zn at this pH?
- Complexometric titration must be performed at pH 10.0 True FalseTitration of 50.00 mL of 0.04715 M Na2C2O4 required 39.25 mL of a potassium permanganate solution. 2MnO4- + 5C2O4-2 +16H+ -> 2Mn2+ + 10CO2(g) + 8H2O Calculate the molar concentration of the KMnO4 solution. Pls show step by step. What type of molecules will interfere in this analysis ?2.1 Calculate the pH of the pre-equivalence solution for the titration of 25mL of a 0.025 M H2SO4 solution with 0.050 M NaOH, after the addition of 25.9 mL NaOH. 2.2 Name 5 requirements of a compound that will be used as a primary standard in titrimetry
- 1_ In the titration why the colour changes from wine red to bue? 2_what are the harmful effects of hard water? 3_write the principle involved in hardness of water by EDTA method?50 mL of a sample known to contain Mg+2 was taken and titrated with 0.075 M EDTA standard solution by adding pH 10 buffer and EBT indicator. Since the EDTA consumption is 10.5 mL, what is the amount of magnesium in the sample in ppm?Enumerate at least 2 specific medical applications of complexometric titration and discuss each.
- 100.0 mL sample of drinking water was buffered with ammonia at pH 10 and after addition of EBT required 21.4 mL of 0.00512 M EDTA for titration. FW CaCO3 = 100.09 g/mol. What will be the change in color at the end point? What is the water hardness in terms of ppm CaCO3?. What is the role of ammonia buffer in the analysis?In the determination of water hardness by volumetry, AEDT is used. If the volume of 0.01 M EDTA used to titrate 100 mL of sample was 20 mL, calculate the total hardness expressed in mg/L of CaCO3.Calculate the silver ion concentration in terms of pAg during the titration of 70.00 mL of 0.07000 M NaCl with 0.1000 M AgNO3 after the addition of the following volumes of reagent: (a) in the preequivalence point region at 20.00 mL, (b) at the equivalence point (25.00 mL), (c) after the equivalence point at 50.00 mL. For AgCl, Ksp = 1.82E10-10. Show your answer with three significant figures.