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. a) What volume of EDTA is used in titrating the Ca in the hard water? b) How many moles of EDTA are there in that volume? moles c) How many moles of Ca2* are in 100 mL of water? moles

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. a) What volume of EDTA is used in titrating the Ca in the hard water? b) How many moles of EDTA are there in that volume? moles c) How many moles of Ca2* are in 100 mL of water? moles

Chemical Principles in the Laboratory

11th Edition

ISBN:9781305264434

Author:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Publisher:Emil Slowinski, Wayne C. Wolsey, Robert Rossi

Chapter28: Determination Of The Hardness Of Water

Section: Chapter Questions

Problem 3ASA: A 100-mL sample of hard water is titrated with the EDTA solution in Problem 2. The same amount of...

See similar textbooks

Similar questions

What mass of ZnS (Ksp = 2.5 1022) will dissolve in 300.0 mL of 0.050 M Zn(NO3)2? Ignore the basic properties of S2.
A 100-mL sample of hard water is titrated with the EDTA solution in Problem 2. The same amount of Mg2 is added as previously, and the volume of EDTA required is 31.84 mL. a. What volume of EDTA is used in titrating the Ca2 in the hard water? _____________mL b. How many moles of EDTA are there in that volume? _____________ moles c. How many moles of Ca2 are there in the 100 mL of water? _____________ moles d. If the Ca2 comes from CaCO3, how many moles of CaCO3 are there in one liter of the water? How many grams of CaCO3 are present per liter of the water? _____________ mol / L _____________ g / L e. If 1 ppm CaCO3 = 1 mg per liter, what is the water hardness in ppm CaCO3? _____________ ppm CaCO3
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 c) How many moles of Ca²* are in 100 mL of water?
The molarity of an EDTA solution is 0.0114 M. A 25.0 mL sample of water with unknown Ca+2 concentration is titrated with this EDTA solution and requires an average volume of 22.60 mL of EDTA. How many grams of CaCO3 is present per liter of water sample?
0.0322 M EDTA solution is used as the titrant in the titration of a 50.00 mL solution that is 0.0129 M in Cu2+. The solution is held at pH = 10.00 by a buffer that is 0.050 in ammonia (NH3). At what volume (in mL) of EDTA added will the equivalence point be reached?
How much 0.0500 M EDTA is needed to titrate the Mg and Ca in a 0.2385-g sample that is 92.5% dolomite, CaCO₃•MgCO₃ (184.4 g/mol). CHOICES: 23.9 mL 47.9 mL 67.2 mL None of these
A 30.00-mL solution containing 0.1553 M Na2C204 was titrated with 0.1250 M Ca(NO3)2 to precipitate calcium oxalate: Ca + C,0, CaC,O4(s) Ksp 1.3 x 108 What is the pCa at the equivalence point? O A 4.56 O B. 2.52 OC. 4.50 OD. 1.75 O E. 3.94
1. TRUE OR FALSE (a) EDTA is commonly used as a PRIMARY standard for titration of metals in samples True False (b) Metal ions bind with EBT indicator turns the the solution wine red in color True False
If you have a sample of 100 mg/L of calcium, and you have two standardized EDTA solutions of 0.005 M and 0.001 M, which is more suitable to spend approximately 15.00 mL of the titrant if 25.00 mL of sample are added in the Erlenmeyer flask? How many mL of titrant will be used?