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18. Define the total alkalinity index and the phenolphthalein alkalinity index for water.
1. a. Define alkalinity of a water sample. b. What is/are the principle ions contributing to...
1. a. Define alkalinity of a water sample. b. What is/are the principle ions contributing to the alkalinity of a water sample? 2· "P" and "T"alkalinities are determined for a water sample in this experiment. a. Differentiate between the Experimental Procedures of the two determinations. b. What is the color change at the "P" endpoint? What is the color change at the T" endpoint? c. Explain why the "T" alkalinity is generally greater than the "P alkalinity for a water...
A water sample has a total hardness of 275 mg/L as CaCO3 and a total alkalinity...
A water sample has a total hardness of 275 mg/L as CaCO3 and a total alkalinity of 320 mg/L as CaCO3. What are the carbonate and non-carbonate hardness (in mg/L as CaCo2) of the water sample? Use the relationship when alkalinity < total hardness, carbonate hardness(mg/L) - alkalinity(mg/L) and when alkalinity >/= total hardness Carbonate hardness(mg/L) -totalk hardness(mg/L) if necessary
Q4. (Exercise 1.35) Alkalinity of water. The alkalinity level of water specimens collected from the Han...
Q4. (Exercise 1.35) Alkalinity of water. The alkalinity level of water specimens collected from the Han River in Seoul, Korea, has a mean of 50 milligrams per liter and a standard deviation of 3.2 milligrams per liter (Environmental Science and Engineering, September 1, 2000). Assume the distribution of alkalinity levels is approximately normal. Find the probability that a water specimen collected from the river has an alkalinity level (a) exceeding 45 milligrams per liter. (0.5 pt) (b) below 55 milligrams...
Determine the alkalinity in mg/L CaCOs for DI water and tap water based on the number of digits (...
To pH of 8.3
To pH of 4.5
0
320
Alkalinity.
Wastewater Problem.
Determine the alkalinity in mg/L CaCOs for DI water and tap water based on the number of digits (digits= mg/L CaCO3 in 100 ml) Assuming that 25mg/L of filter alum [Al2(SO4)3-14.3 H2O] with MW-600 was used for coagulation, determine the total amount of alkalinity consumed in mg/L CaCOs from coagulation and flocculation. Is the amount of alkalinity consumed from coagulation less than, equal to, or greater than...
A student is running a titration in the laboratory to determine the alkalinity (Total, bicarbonate and...
A student is running a titration in the laboratory to determine the alkalinity (Total, bicarbonate and carbonate, hydroxide) of a drinking water sample. The initial pH of the sample is 11.6; 0.02N H2SO4 is used as the titrant; and the sample volume subjected to the titration is 100 mL (0.1L). The results of the titrations were as follows: 18.3 (volume of titrant to drop the pH from 11.6 to 8.3) = 10.0 mL; V4.5 (volume of titrant to drop the...
Problem 1. The alkalinity in raw water entering a drinking water plant can decrease during sig-...
Problem 1. The alkalinity in raw water entering a drinking water plant can decrease during sig- nificant rainfall events. Jar tests showed an optimal alum (MW 594) dosage of 35 mg/1. If the raw water contains an alkalinity concentration of 25 mg/1 as CaCOs and a pH of 7.5, does sufficient alkalinity exist to buffer a decrease in pH?
Alkalinity: The approximate alkalinity of a water sample is 2.21 x 10-2 M at pH=10.33. Determine...
Alkalinity: The approximate alkalinity of a water sample is 2.21 x 10-2 M at pH=10.33. Determine the concentration of carbonate (CO32-) in M and mg/L as CaCO3. (pKa=10.33). Answer: [CO32-] = 7.37x10-3 M and 737 mg/L as CaCO3 Please show the solution to this problem.
11. Calculate for the following samples of water the hydroxide, carbonate and bicarbonate alkalinity by b)...
11. Calculate for the following samples of water the hydroxide, carbonate and bicarbonate alkalinity by b) Using alkalinity plas pH measurements, if 100 ml of the sample s titrated against Niso H,so, in each case at 250 11.0 10.0 11.2 7.0 10.0 14.1 38.6
In an alkalinity titration of a 100.0-mL sample of water from a hot spring, 2.56 mL...
In an alkalinity titration of a 100.0-mL sample of water from a hot spring, 2.56 mL of a 0.0355 M solution of HCl is needed to reach the first equivalence point (pH=8.3) and another 10.42 mL is needed to reach the second equivalence point (pH=4.0). If the alkalinity of the spring water is due only to the presence of carbonate and bicarbonate, what are the concentrations of each of them?
(10 pts) Analysis of water that requires treatment is shown below. Find alkalinity of this water...
(10 pts) Analysis of water that requires treatment is shown below. Find alkalinity of this water in mg/L as CaCO3 lon Concentration in mg/L of ion Mg*2 Ca+2 So, 2 HCO3 110 Na 100
1. a. Define alkalinity of a water sample. b. What is/are the principle ions contributing to the alkalinity of a water sample? 2· "P" and "T"alkalinities are determined for a water sample in this experiment. a. Differentiate between the Experimental Procedures of the two determinations. b. What is the color change at the "P" endpoint? What is the color change at the T" endpoint? c. Explain why the "T" alkalinity is generally greater than the "P alkalinity for a water...
Q4. (Exercise 1.35) Alkalinity of water. The alkalinity level of water specimens collected from the Han River in Seoul, Korea, has a mean of 50 milligrams per liter and a standard deviation of 3.2 milligrams per liter (Environmental Science and Engineering, September 1, 2000). Assume the distribution of alkalinity levels is approximately normal. Find the probability that a water specimen collected from the river has an alkalinity level (a) exceeding 45 milligrams per liter. (0.5 pt) (b) below 55 milligrams...
To pH of 8.3
To pH of 4.5
0
320
Alkalinity.
Wastewater Problem.
Determine the alkalinity in mg/L CaCOs for DI water and tap water based on the number of digits (digits= mg/L CaCO3 in 100 ml) Assuming that 25mg/L of filter alum [Al2(SO4)3-14.3 H2O] with MW-600 was used for coagulation, determine the total amount of alkalinity consumed in mg/L CaCOs from coagulation and flocculation. Is the amount of alkalinity consumed from coagulation less than, equal to, or greater than...
A student is running a titration in the laboratory to determine the alkalinity (Total, bicarbonate and carbonate, hydroxide) of a drinking water sample. The initial pH of the sample is 11.6; 0.02N H2SO4 is used as the titrant; and the sample volume subjected to the titration is 100 mL (0.1L). The results of the titrations were as follows: 18.3 (volume of titrant to drop the pH from 11.6 to 8.3) = 10.0 mL; V4.5 (volume of titrant to drop the...
Problem 1. The alkalinity in raw water entering a drinking water plant can decrease during sig- nificant rainfall events. Jar tests showed an optimal alum (MW 594) dosage of 35 mg/1. If the raw water contains an alkalinity concentration of 25 mg/1 as CaCOs and a pH of 7.5, does sufficient alkalinity exist to buffer a decrease in pH?
11. Calculate for the following samples of water the hydroxide, carbonate and bicarbonate alkalinity by b) Using alkalinity plas pH measurements, if 100 ml of the sample s titrated against Niso H,so, in each case at 250 11.0 10.0 11.2 7.0 10.0 14.1 38.6
(10 pts) Analysis of water that requires treatment is shown below. Find alkalinity of this water in mg/L as CaCO3 lon Concentration in mg/L of ion Mg*2 Ca+2 So, 2 HCO3 110 Na 100
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