A 75-mL sample required 22.2 mL of 0.02 N H2SO4 to reach the phenolphthalein end point, and a total of 27.6 mL to reach the mehtyl orange end point. Clearly indicate your selection to answer the following questions: 4.1 The phenolphthalein alkalinity of the sample is: a) 166 mg/L as CaCO3 b) 296 mg/L as CaCO3 4.2 The total alkalinity of the sample is: a) 211 mg/L as CaCO3 b) 286 mg/L as CaCO3 4.3 The hydroxide alkalinity of the sample is: a) 0 mg/L as CaCO3 c) 325 mg/L as CaCO3 d) 456 mg/L as CaCO3 c) 368 mg/L as CaCO3 d) 555 mg/L as CaCO3 b) 224 mg/L as CaCO3 c) 394 mg/L as CaCO3 4.4 The carbonate alkalinity of the sample is: a) 0 mg/L as CaCO3 b) 144 mg/L as CaCO3 c) 345 mg/L as CaCO3 d) 582 mg/L as CaCO3 d) 635 mg/L as CaCO3
A 75-mL sample required 22.2 mL of 0.02 N H2SO4 to reach the phenolphthalein end point, and a total of 27.6 mL to reach the mehtyl orange end point. Clearly indicate your selection to answer the following questions: 4.1 The phenolphthalein alkalinity of the sample is: a) 166 mg/L as CaCO3 b) 296 mg/L as CaCO3 4.2 The total alkalinity of the sample is: a) 211 mg/L as CaCO3 b) 286 mg/L as CaCO3 4.3 The hydroxide alkalinity of the sample is: a) 0 mg/L as CaCO3 c) 325 mg/L as CaCO3 d) 456 mg/L as CaCO3 c) 368 mg/L as CaCO3 d) 555 mg/L as CaCO3 b) 224 mg/L as CaCO3 c) 394 mg/L as CaCO3 4.4 The carbonate alkalinity of the sample is: a) 0 mg/L as CaCO3 b) 144 mg/L as CaCO3 c) 345 mg/L as CaCO3 d) 582 mg/L as CaCO3 d) 635 mg/L as CaCO3
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:A 75-mL sample required 22.2 mL of 0.02 N H2SO4 to reach the phenolphthalein end point,
and a total of 27.6 mL to reach the mehtyl orange end point. Clearly indicate your selection to
answer the following questions:
4.1 The phenolphthalein alkalinity of the sample is:
a) 166 mg/L as CaCO3 b) 296 mg/L as CaCO3
4.2 The total alkalinity of the sample is:
a) 211 mg/L as CaCO3 b) 286 mg/L as CaCO3
4.3 The hydroxide alkalinity of the sample is:
a) 0 mg/L as CaCO3
c) 325 mg/L as CaCO3 d) 456 mg/L as CaCO3
c) 368 mg/L as CaCO3 d) 555 mg/L as CaCO3
b) 224 mg/L as CaCO3 c) 394 mg/L as CaCO3
4.4 The carbonate alkalinity of the sample is:
a) 0 mg/L as CaCO3
b) 144 mg/L as CaCO3 c) 345 mg/L as CaCO3
d) 582 mg/L as CaCO3
d) 635 mg/L as CaCO3
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