Homework Answers
Add Answer to:
Hardness in groundwater is due to the presence of metal ions, primarily Mg2 and Ca2t. Hardness...
Hardness in groundwater is due to the presence of metal ions, primarily Mg2+ and Ca2+. Hardness...
Hardness in groundwater is due to the presence of metal ions, primarily Mg2+ and Ca2+. Hardness is generally reported as ppm CaCO3. To measure water hardness, a sample of groundwater is titrated with EDTA, a chelating agent, in the presence of the indicator Eriochrome Black T, symbolized as In. Eriochrome Black T, a weaker chelating agent than EDTA, is red in the presence of Ca2+ and turns blue when Ca2+ is removed. red blue Ca(In)2+ +EDTACa(EDTA) 2+ In A 50.00...
Hardness in groundwater is due to the presence of metal ions, primarily Mg^2+ and Ca^2+. Hardness...
Hardness in groundwater is due to the presence of metal ions, primarily Mg^2+ and Ca^2+. Hardness is generally reported as ppm CaCOj or mmol/L Ca^2+. To measure water hardness, a sample of groundwater is titrated with EDTA, a chelating agent, in the presence of the indicator eriochrome black T, symbolized here as In. Eriochrome black T, a weaker chelating agent than EDTA, is red in the presence of Ca2* and turns blue when Ca2* is removed. Ca(ln)^2+ + EDTA rightarrow...
Name Section Experiment 28 Advance Study Assignment: Determination of the Hardness of Water 1. A 0.3946...
Name Section Experiment 28 Advance Study Assignment: Determination of the Hardness of Water 1. A 0.3946 g sample of Caco, is dissolved in 12 M HCl and the resulting solution is diluted to 250.0 mL in a volumetric flask. a. How many moles of Caco, are used (formula mass = 100.1)? moles b. What is the molarity of the Ca2+ in the 250 mL of solution? c. How many moles of Caare in a 25.00-mL aliquot of the solution in...
Determining the Hardness of Water (from like a local well) a) Determine the total hardness of...
Determining the Hardness of Water (from like a local well) a) Determine the total hardness of 100ml sample of hard water if 25.6ml of 0.1000M EDTA was titrated into the solution. The solution also contained 2ml of pH 10 ammonium buffer and some eriochrome black indicator for the titration process to occur. Please report this value as mg CaCO3/L. (ppm) b) Determine the calcium concentration of the same 100ml hard water sample if 20.1ml of 0.1000M EDTA was titrated into...
0.1001 Sample Volume ViEDTA VI EDTA 0135L 02して'8_1 O1241L AVEDTA ,moles EDTA moles EDTA Moles E...
0.1001 Sample Volume ViEDTA VI EDTA 0135L 02して'8_1 O1241L AVEDTA ,moles EDTA moles EDTA Moles EDTA Molesca2. Sample [Ca2* moles Ca moles Ca2 mg CaCO3 mg CaCO3 Sample Hardness USGS Hardness Classification mg CaCO3 Accepted Hardness % Error Chemicals, Materials and Equipment Eriochrome Black T indicator solution (0.4 g/L) Disodium EDTA solution (0.0100 M) Ammonia/Ammonium Chloride Buffer (pH 10) Magneisum Chloride Solution (1x103 M) Saturated CaSO4 solutions previously prepared and equilibrated to 60°C and 90°0C hot/stir plate 60°C and 90°C...
Water Hardness by EDTA Titration Objective: To determine [Ca2+,MG2+] and [Mg2+] concentration in an unknown water...
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...
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...
I need help please. was titrated with a 1.00 x 10M EDTA solution. It took A...
I
need help please.
was titrated with a 1.00 x 10M EDTA solution. It took A 12.0 mL sample of water from a kitchen tap was titrated with a 1.00 x 102 MED 1.00 mL of the EDTA solution to change the indicator from red to blue. 1) What is the total number of moles of Ca* + Mg in the Swan Lake water sam Cake water sample? mmoles of EDTA 1.00.102.1.00m2 =1.00.102 mme Ca 2+ + m2tions = 1.00...
Name Section QUESTIONS: EXPERIMENT 17 Date 1 In a hardness of water determination like the one...
Name Section QUESTIONS: EXPERIMENT 17 Date 1 In a hardness of water determination like the one performed in this experiment, it was found that a 25.00-ml sample of water required 12.25 mL of 0.0128 M EDTA solution for complete titration. What is the concentration (molarity) of Ca2+ ions in the water sample? What is the concentration of Caco (in mg/L) in the water sample? Describe the hardness level of the wate using the U.S. government standards, Ca?molarity CaCO3 concentration, mg/L_...
CALCIUM HARDNESS DETERMINATION Fill a 50 mL burette with 0.01 M EDTA solution, making sure the...
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...
Hardness in groundwater is due to the presence of metal ions, primarily Mg2+ and Ca2+. Hardness is generally reported as ppm CaCO3. To measure water hardness, a sample of groundwater is titrated with EDTA, a chelating agent, in the presence of the indicator Eriochrome Black T, symbolized as In. Eriochrome Black T, a weaker chelating agent than EDTA, is red in the presence of Ca2+ and turns blue when Ca2+ is removed. red blue Ca(In)2+ +EDTACa(EDTA) 2+ In A 50.00...
Hardness in groundwater is due to the presence of metal ions, primarily Mg^2+ and Ca^2+. Hardness is generally reported as ppm CaCOj or mmol/L Ca^2+. To measure water hardness, a sample of groundwater is titrated with EDTA, a chelating agent, in the presence of the indicator eriochrome black T, symbolized here as In. Eriochrome black T, a weaker chelating agent than EDTA, is red in the presence of Ca2* and turns blue when Ca2* is removed. Ca(ln)^2+ + EDTA rightarrow...
Name Section Experiment 28 Advance Study Assignment: Determination of the Hardness of Water 1. A 0.3946 g sample of Caco, is dissolved in 12 M HCl and the resulting solution is diluted to 250.0 mL in a volumetric flask. a. How many moles of Caco, are used (formula mass = 100.1)? moles b. What is the molarity of the Ca2+ in the 250 mL of solution? c. How many moles of Caare in a 25.00-mL aliquot of the solution in...
0.1001 Sample Volume ViEDTA VI EDTA 0135L 02して'8_1 O1241L AVEDTA ,moles EDTA moles EDTA Moles EDTA Molesca2. Sample [Ca2* moles Ca moles Ca2 mg CaCO3 mg CaCO3 Sample Hardness USGS Hardness Classification mg CaCO3 Accepted Hardness % Error Chemicals, Materials and Equipment Eriochrome Black T indicator solution (0.4 g/L) Disodium EDTA solution (0.0100 M) Ammonia/Ammonium Chloride Buffer (pH 10) Magneisum Chloride Solution (1x103 M) Saturated CaSO4 solutions previously prepared and equilibrated to 60°C and 90°0C hot/stir plate 60°C and 90°C...
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...
I
need help please.
was titrated with a 1.00 x 10M EDTA solution. It took A 12.0 mL sample of water from a kitchen tap was titrated with a 1.00 x 102 MED 1.00 mL of the EDTA solution to change the indicator from red to blue. 1) What is the total number of moles of Ca* + Mg in the Swan Lake water sam Cake water sample? mmoles of EDTA 1.00.102.1.00m2 =1.00.102 mme Ca 2+ + m2tions = 1.00...
Name Section QUESTIONS: EXPERIMENT 17 Date 1 In a hardness of water determination like the one performed in this experiment, it was found that a 25.00-ml sample of water required 12.25 mL of 0.0128 M EDTA solution for complete titration. What is the concentration (molarity) of Ca2+ ions in the water sample? What is the concentration of Caco (in mg/L) in the water sample? Describe the hardness level of the wate using the U.S. government standards, Ca?molarity CaCO3 concentration, mg/L_...
Most questions answered within 3 hours.
-
Explain traveling wave theory. Explain how the peaking of the
wave leads to action potentials and...
asked 8 minutes ago -
If you mixed 35.0 mLmL of 0.100 M Tris-HCl with 65.0
mLmL of 0.200 M Tris-base, what would...
asked 4 minutes ago -
Which force do you think wields a stronger influence over our
ethical behavior – our personal...
asked 10 minutes ago -
11.1 In the northeast
regions of the United States and in eastern Canada, many people
heat their...
asked 9 minutes ago -
What is the entropy change to the surroundings when 1 mol of ice
melts in someone's...
asked 10 minutes ago -
Are adult gamers less likely to use a gaming console (Xbox,
PlayStation, Wii, etc...) than teen...
asked 15 minutes ago -
Pt1
An electrochemical cell is set up at 25°C based on the overall
reaction represented by...
asked 17 minutes ago -
Bruin, Inc., has identified the following two mutually
exclusive projects:
Year
Cash Flow (A)
Cash...
asked 19 minutes ago -
A mutual fund salesperson has arranged to call on four people
tomorrow. Based on past experience...
asked 22 minutes ago -
The decomposition of SO2Cl2 is first order
and has a rate constant of + 2.90 x...
asked 44 minutes ago -
A solid, frictionless cylindrical reel of mass M=5.00kg and
radius R=0.55m is used to draw water...
asked 1 hour ago -
The work done by the spring's restoring force
on the free end of a spring while...
asked 39 minutes ago