Homework Answers
Concentration of Ca = 3.5 mM x 40.1 gm / mol = 140.35.mg / L
concentration of Mg = 3.5 mM x 24.3 gm / mol = 85.05 mg / L
total concentration = 225.4 mg / L
correct answer is ( d )
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If the concentration of total calcium and magnesium in the Mississippi water is in the range...
The total hardness a water sample is 200 mg/l as CaCO3. The calcium (Ca2+) concentration is...
The total hardness a water sample is 200 mg/l as CaCO3. The calcium (Ca2+) concentration is 50 mg/l. Calculate the magnesium (Mg2+) concentration, in mg/l.
Calculate the following: a.) The molar concentration of calcium ions and carbonate ions in pure water....
Calculate the following: a.) The molar concentration of calcium ions and carbonate ions in pure water. b.) The molar solubility of calcium carbonate in pure water. c.) The mass, in mg, of calcium carbonate (MM = 100 g/mol) you would need to dissolve in 1 L of pure water to make a saturated solution.
2. (12 points). You need to soften a water that has high concentrations of dissolved calcium...
2. (12 points). You need to soften a water that has high concentrations of dissolved calcium and magnesium. (a) You measure the Cat concentration as 55 mg/L and the Mg concentration as 10 mg/L. What are these concentrations in units of mM? (b) One possible treatment operation to soften the water is to precipitate the calcium and magnesium as solids. The total carbonate species here is 16 mm. In this case, you recommend raising the pH where both CaCO., and...
Flame Atomic Absorption of Calcium In Milk 2. Record the atomic absorption data for the calcium...
Flame Atomic Absorption of Calcium In Milk
2. Record the atomic absorption data for the calcium standard curve and the diluted milk. Sample Ca? Concentration No. Absorbance 1 mg/L 5 mg/L 10 mg/L Milk, diluted 200 times 07 4. Calculating Ca2+ concentration in milk. a) Slope of the Ca2standard curve: _ graph.) (Show work if using hand-generated b) Concentration of Ca2+ in 200x diluted milk: (Show work.) c) Concentration of Ca2+ in milk: - (Show work.)
test for common ions are run on a sample of water Fall Semester, 2018 Tutorial 4...
test for common ions are run on a sample of water
Fall Semester, 2018 Tutorial 4 Tests for common ions are run on a sample of water and the results are shown below HCO, 165mg/L so'. 173 mg/L cr = 202 mg/L Draw a milliequivalent-per-iter bar diagram and determine the error in the ion balance. L. Na+ Mg> Ca2+ 124 mg/L 28 mg/L 70 mg/L = = 2. A laboratory measures the following concentrations of ions in a sample of...
PRE-LABORATORY QUESTIONS, WATER: DETERMINING THE CONCENTRATION OF CALCIUM IONS IN WATER SAMPLES EXPT. SA HARD Prior...
PRE-LABORATORY QUESTIONS, WATER: DETERMINING THE CONCENTRATION OF CALCIUM IONS IN WATER SAMPLES EXPT. SA HARD Prior to coming to lab, carefully read the entire experimental procedure that follows and write an outline of the procedure in your lab notebook IN YOUR OWN WORDS (do not simply copy). Then, add three tables for your titrations of the blank, tap water, and CaCl samples. Complete these problems and hand in gt the bexinning of the laboratory period. Show all work. EDTA is...
#1 [5 pts) A water sample contains 60 mg/L of calcium, 60 mg/L of magnesium, and...
#1 [5 pts) A water sample contains 60 mg/L of calcium, 60 mg/L of magnesium, and 25 mg/L of sodium. Assuming the alkalinity of the water is 394 mg/L CaCO3. Estimate Total Hardness, Carbonate Hardness, and Noncarbonate Hardness using all polyvalent cations.
#1 A water sample contains 60 mg/L of calcium, 60 mg/L of magnesium, and 25 mg/L...
#1 A water sample contains 60 mg/L of calcium, 60 mg/L of magnesium, and 25 mg/L of sodium. Assuming the alkalinity of the water is 394 mg/L CaCO3. Estimate Total Hardness, Carbonate Hardness, and Noncarbonate Hardness using all polyvalent cations. #2 What is the % error using only the predominant cations? #3 Construct a bar chart to determine the speciation of the hardness
15 total points. a) 10 points. A large facility requires a demineralizer to produce makeup water...
15 total points. a) 10 points. A large facility requires a demineralizer to produce makeup water for an industrial boiler. (Typically 50-90% of the condensate from the steam is returned.) Calculate the amounts of H2SO4 and NaOH (100% basis) required in a dual bed 7. ion exchange system supply to remove the calcium and chloride ions in 1000 m3 of water containing 125 mg CaCl2/L. Assume 100% efficiency of chemical usage (which is a good first assumption but is not...
The department of health and human services recently recommended the concentration of fluoride in drinking water be limited to 0.7mg/L (the current policy allows for a range of 0.7 to 1.2 mg/L). The...
The department of health and human
services recently recommended the concentration of fluoride in
drinking water be limited to 0.7mg/L (the current policy allows for
a range of 0.7 to 1.2 mg/L). The concentration of fluoride in
natural water depends on The presence of fluoride-containing
minerals
9. (7 points) The Department of Health and Human Services recenty recommended oe concentration of fluoride in drinking water be limited to 0.7 mg (the current poley wws t a range of 0.7 to...
2. (12 points). You need to soften a water that has high concentrations of dissolved calcium and magnesium. (a) You measure the Cat concentration as 55 mg/L and the Mg concentration as 10 mg/L. What are these concentrations in units of mM? (b) One possible treatment operation to soften the water is to precipitate the calcium and magnesium as solids. The total carbonate species here is 16 mm. In this case, you recommend raising the pH where both CaCO., and...
Flame Atomic Absorption of Calcium In Milk
2. Record the atomic absorption data for the calcium standard curve and the diluted milk. Sample Ca? Concentration No. Absorbance 1 mg/L 5 mg/L 10 mg/L Milk, diluted 200 times 07 4. Calculating Ca2+ concentration in milk. a) Slope of the Ca2standard curve: _ graph.) (Show work if using hand-generated b) Concentration of Ca2+ in 200x diluted milk: (Show work.) c) Concentration of Ca2+ in milk: - (Show work.)
test for common ions are run on a sample of water
Fall Semester, 2018 Tutorial 4 Tests for common ions are run on a sample of water and the results are shown below HCO, 165mg/L so'. 173 mg/L cr = 202 mg/L Draw a milliequivalent-per-iter bar diagram and determine the error in the ion balance. L. Na+ Mg> Ca2+ 124 mg/L 28 mg/L 70 mg/L = = 2. A laboratory measures the following concentrations of ions in a sample of...
PRE-LABORATORY QUESTIONS, WATER: DETERMINING THE CONCENTRATION OF CALCIUM IONS IN WATER SAMPLES EXPT. SA HARD Prior to coming to lab, carefully read the entire experimental procedure that follows and write an outline of the procedure in your lab notebook IN YOUR OWN WORDS (do not simply copy). Then, add three tables for your titrations of the blank, tap water, and CaCl samples. Complete these problems and hand in gt the bexinning of the laboratory period. Show all work. EDTA is...
#1 [5 pts) A water sample contains 60 mg/L of calcium, 60 mg/L of magnesium, and 25 mg/L of sodium. Assuming the alkalinity of the water is 394 mg/L CaCO3. Estimate Total Hardness, Carbonate Hardness, and Noncarbonate Hardness using all polyvalent cations.
15 total points. a) 10 points. A large facility requires a demineralizer to produce makeup water for an industrial boiler. (Typically 50-90% of the condensate from the steam is returned.) Calculate the amounts of H2SO4 and NaOH (100% basis) required in a dual bed 7. ion exchange system supply to remove the calcium and chloride ions in 1000 m3 of water containing 125 mg CaCl2/L. Assume 100% efficiency of chemical usage (which is a good first assumption but is not...
The department of health and human
services recently recommended the concentration of fluoride in
drinking water be limited to 0.7mg/L (the current policy allows for
a range of 0.7 to 1.2 mg/L). The concentration of fluoride in
natural water depends on The presence of fluoride-containing
minerals
9. (7 points) The Department of Health and Human Services recenty recommended oe concentration of fluoride in drinking water be limited to 0.7 mg (the current poley wws t a range of 0.7 to...
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