Problem 4. A receipt of surface water sample is given in Table below: Substance Concentration (mg/L) Total Hardness 1000 mg/L CaCO3 Phenolphthalein acidity 5 mg/L CaCO3 Phenolphthalein Alkalinity 3 mg/L CaCO3 It is known that phenolphthalein alkalinity is only due to CO3²- and phenolphthalein acidity is only due to H₂CO3. Assuming the hardness of sample is because of calcium and magnesium ions, alkalinity-acidity are due to the carbonate species, calculate: a) The pH of sample. b) Temporary and permanent hardness as mg/L CaCO3. c) Total alkalinity and acidity as mg/L CaCO3. Molecular weights (g/mole): Ca = 40, Mg = 24, H = 1, C = 12, 0 = 16
Problem 4. A receipt of surface water sample is given in Table below: Substance Concentration (mg/L) Total Hardness 1000 mg/L CaCO3 Phenolphthalein acidity 5 mg/L CaCO3 Phenolphthalein Alkalinity 3 mg/L CaCO3 It is known that phenolphthalein alkalinity is only due to CO3²- and phenolphthalein acidity is only due to H₂CO3. Assuming the hardness of sample is because of calcium and magnesium ions, alkalinity-acidity are due to the carbonate species, calculate: a) The pH of sample. b) Temporary and permanent hardness as mg/L CaCO3. c) Total alkalinity and acidity as mg/L CaCO3. Molecular weights (g/mole): Ca = 40, Mg = 24, H = 1, C = 12, 0 = 16
Solid Waste Engineering
3rd Edition
ISBN:9781305635203
Author:Worrell, William A.
Publisher:Worrell, William A.
Chapter5: Separation Processes
Section: Chapter Questions
Problem 5.18P
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![Problem 4. A receipt of surface water sample is given in Table below:
Substance
Concentration (mg/L)
Total Hardness
1000 mg/L CaCO3
Phenolphthalein acidity 5 mg/L CaCO3
Phenolphthalein Alkalinity 3 mg/L CaCO3
It is known that phenolphthalein alkalinity is only due to CO3²- and phenolphthalein acidity is only
due to H₂CO3. Assuming the hardness of sample is because of calcium and magnesium ions,
alkalinity-acidity are due to the carbonate species, calculate:
a) The pH of sample.
b) Temporary and permanent hardness as mg/L CaCO3.
c) Total alkalinity and acidity as mg/L CaCO3.
Molecular weights (g/mole): Ca = 40, Mg = 24, H = 1, C = 12, 0 = 16](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F393037b2-7449-4bd7-a188-129f813a1361%2Fdefac2db-9d59-4f43-8982-09c94f01495e%2Fyuk1um_processed.png&w=3840&q=75)
Transcribed Image Text:Problem 4. A receipt of surface water sample is given in Table below:
Substance
Concentration (mg/L)
Total Hardness
1000 mg/L CaCO3
Phenolphthalein acidity 5 mg/L CaCO3
Phenolphthalein Alkalinity 3 mg/L CaCO3
It is known that phenolphthalein alkalinity is only due to CO3²- and phenolphthalein acidity is only
due to H₂CO3. Assuming the hardness of sample is because of calcium and magnesium ions,
alkalinity-acidity are due to the carbonate species, calculate:
a) The pH of sample.
b) Temporary and permanent hardness as mg/L CaCO3.
c) Total alkalinity and acidity as mg/L CaCO3.
Molecular weights (g/mole): Ca = 40, Mg = 24, H = 1, C = 12, 0 = 16
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