The blank titration determines the amount of titrant needed to generate a noticeable endpoint. You can then subtract those mL from the endpoint for your titration to get a more accurate measurement of the Mg and Ca ions.
In determination of water hardness with EDTA, If your blank solution required a large volume of titrant to cause a colour change (come to the end point), what information about the hardness of your sample can you draw from this observation ?
concentration of EDTA : 0.0104375 M Part B: Determination of water hardness Fine 1 Fine 2 Initial Volume of EDTA Final Volume EDTA 0.10mL 10.70mL 1 10.60mL 0.10mL 10.80mL 10.70mL Volume EDTA added Volume of EDTA for water sample Calculate Ca2+/Mg2+ concentration in the water sample. Show the calculations for each titration. Calculation: Calculation: Average concentration of Ca2+/Mg2+ from fine titrations
determination of water hardness need help finding molarity and number of moles Determination of Water Hardness Repo Repov Shee Name Sofia cortez 8:00 am Time M T W Mass of CaCO, sample 377 250 Vol. Cat solution prepared Molarity of Ca2+ Moles of Ca2+ in each aliquot titrated mol Number of moles of Caco, in sample (M.W. = 100.1 g/mol) mol
In a water Hardness complexometric micro-titration, EDTA was used as a standard. The formula is : Ca ^2+ Y^4- - CaY^2 where (Y is EDTA) Suppose the EDTA used was not as dry as it should have been a. Would [EDTA] in the EDTA solution be higher or lower than the actual value? b. Would the [Ca] determined in the unknown be higher or lower than the actual value?
In a water Hardness complexometric micro-titration, EDTA was used as a standard. The formula is : Ca ^2+ Y^4- - CaY^2 where (Y is EDTA) Suppose the EDTA used was not as dry as it should have been a. Would [EDTA] in the EDTA solution be higher or lower than the actual value? b. Would the [Ca] determined in the unknown be higher or lower than the actual value? Answers: a) Due to presence of water, the actual mass of...
25.8 EXPERIMENT 4: DETERMINATION OF WATER HARDNESS DATA SHEET PART II: TESTING FOR TOTAL WATER HARDNESS 0.0100M Concentration of EDTA used Sample 1 25.0 22.35 22.15 Sample 2 25.0 21.7. Sample 3 35.0 21.7 Vol Hard Water Solution Vol EDTA Moles EDTA Average Moles EDTA Moles of Ca2+ Moles of CaCO3 Mass of CaCO3 Mass of Hard Water Solution Total Hardness (ppm)
CALCIUM HARDNESS DETERMINATION Fill a 50 mL burette with 0.01 M EDTA solution, making sure the tip is full and free of air bubbles. Set Start volume. Add 50.00 mL of an unknown hard water solution into a 100 mL beaker. Obtain Magnetic Stirrer from Equipment menu. Place beaker on stirrer. Increase Stir from the context menu. Add 4 mL of 1.0 M Sodium Hydroxide. Add 100 mg of Murexide indicator. Titrate with the 0.01 M EDTA until the color...
Water Hardness by EDTA Titration Objective: To determine [Ca2+,MG2+] and [Mg2+] concentration in an unknown water sample A 0.0107 molarity solution of EDTA is prepared for the experiment. 25 mL of an unknown is pipetted and diluted 100 mL with distilled water and adjusted to a pH between 8 and 10 with NH4OH. A 10.00 mL portion of the diluted unknown is transferred to a 250 mL flask with 3 mL of pH 10 ammonia buffer and tiny amount of...
Chapter 15 Determination of the Hardness of Water 3, A 100-mL. sample of hard water is titrated with the EDTA solution in Problem 2. The same amount of Mg' is added as previously, and the volume of EDTA required is 31.84 mL a What volume of EDTA is used in titrating the Ca" in the hard water? mL h How many moles of EDTA are there in that volume? moles c. How many moles of Ca are there in the...
RAW DATA AND OBSERVATIONS PART 1 DETERMINATION OF TOTAL HARDNESS Concentration of standardized EDTA(ag) O.06162 Table 1-Titrations of 25.00 mL aliquots of mineral water with -0.01 mol L EDTA(aq at pH 10 using Calmagite® as indicator (2,5 marks) Sample 2 l 3 4 Fmol bue He i3 96 b.05 21-70 Volume CmL) Inital bunette 3 46 5.60 i7-30 volume Cm) 10 46 Volume of EDTA oddud Cmb iO.40 CALCULATIONS Use the average volume of EDTA(aq) added to your three titrations...