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1.Write the equation for reaction between Mg2+ and EDTA (H2Y2 )
2. Write the equation for reaction between Ca2+ and EDTA (H2Y2-)
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- 5. A 300.0 mg sample containing Na,CO3, NaHCO3 and NaOH and inert material either alone or in some combination was dissolved and titrated with 0.1000 M HCI the titration required 24.41 mL to reach the phenolphthalein endpoint. And an additional 8.67 mL to reach the methyl red endpoint. Determine the composition of the sample and calculate the percent of each titrated component.Chemistry written by hand. Calculate the concentration of F- using M1V1=M2V2 if 0.027g of NaF was used to make 250.00 ml of 50 ppm F- stock solution. Thank you. Details and clear steps please and thank you.5. A 300.0 mg sample containing Na,CO3, NaHCO, and NaOH and inert material either alone or in some combination was dissolved and titrated with 0.1000 M HCI the titration required 24.41 ml to reach the phenolphthalein endpoint. And an additional 8.67 mL to reach the methyl red endpoint. Determine the composition of the sample and calculate the percent of each titrated component.
- The distribution constant for X between n-hexane and water is 8.9. Calculate the concentration of X remaining in the aqueous phase after 30.0 mL of 0.200 M X is treated by extraction with the following quantities of n-hexane: a. one 40.0-mL portion. Concentration = b. two 20.0-ml portions. Concentration = c. four 10.0-mL portions. Concentration = d. eight 5.00-ml portions. Concentration = M Σ Σ Σ ΣSTANDARDIZATION OF NAOH SOLUTION A 0.4047 g sample of primary standard grade potassium hydrogen phthalate (MM = 204.23) was dissolved in distilled H2O. The solution required 22.42 mL of the NaOH solution to reach the phenolphthalein end point. a.) Calculate the number of mmoles of KHP. b.) How many moles of NaOH will react with the KHP dissolved in water? c.) Calculate the molarity of the NaOH solution.30mL 0.9% v/v green food coloring. Transfer 2mL of of food coloring to flask, QS the flask to 100mL with DI water. What is the concentration of the standard?
- the solution. 2. A standard solution of EDTA is prepared, and by titration each ml is found to complex with the Mg in 10.0ml of a solution containing 0.300g of MgCl₂ per liter. A 100 ml pipetful of a certain well water is found to require 8.60 ml of the standard EDTA. (With the knowledge that the conventional method of expressing water hardness in terms of ppm of CaCO3 regardless of the nature of the Carbons and anions actually present, what is the hardness of the well water?3) Fluoridated teeth, CaF2 has a Ks.p. = 6.5 x 10-11. How many grams of Calcium would dissolve per 100 ml : (a) in pure water, (b) in a 0.75M AIF3 solutionUEid- base tit ration the Consentrat ion of ammonia Solution excess HCL was titrated ith o.07om Na, cO3 Solutian. The volume of Na, Coz Solution reguired was 15.50 ml using the following eguations: 2HCLem> + Na, COgcaps CO2 Cays + HzO1) t NaCL Calculate the concentration (molarity and ppm) of ammonia in the Original Solution.(MM of NHzis 17.031.9/4) 10.0 was by of o.10OMI HCE to Then
- 1,2 g of marble (calcium carbonate) containing sand as the only impurity is dissolved in 50,0 cm of 1,0 mol.dm- HCI solution. The excess acid is neutralized by 13,5 cm3 of caustic soda (NaOH) of concentration of 2,0 mol.dm-3. Calculate the percentage of CaCO3 in the original mixture. 4.Yerleştirme Görüntü Paylaş Pencere Yardım Report Fe spectro 2 %125 Ekle Tablo Grafik Metin Ortamlar Yorum Answer the following questions. 1) The 40 mg/L Fe stock solution was prepared with iron (II) ammonium sulfate hesahystoate [Fe(NH.):(SO.):(H;O)«] rather than with iron (II) chloride [FeCl:). What is the reason of this choice? 2) For convenience, several glass or quartz cells are generally used spectrophotometrie analyses; these cells should be "matched" with regard to their.optical properties. a) Why they should match with each other? b) Suppose one of the cells has a light path that is slightly longer than the usual 1.00 cm. How would this affect the results of an analysis if the defect was not recognized? c) Explain how the "unmatched' cell problem can be solved? 3) Draw the scheme of single bcam spectrophotometer and state the function of each compartment sepcrately.Preparation of sodium standard solutions with concentrations of 10, 20, 40, 60, 80, 100 (ppm) in a volume of 100 ml for each solution. [using a 100 ppm reference solution prepared from a weight of sodium chloride in a volume of 1 liter]