1-7. A water contains 200 mg/L Ca, 75 mg/L Mg, 180 mg/L HCO3, and 150 mg/L. CO₂- all expressed as CaCO3. Determine the chemical dosages required to soften this water as much as possible without removing magnesium. What will the final hardness be? 1-8. If the water of P 7 is to be softened to a final hardness of 85 mg/L as CaCO, and is not to contain more than 25 mg/L. Mg as CaCO3, find the required chemical dosages. hinh will produce a water meeting the

1-7. A water contains 200 mg/L Ca, 75 mg/L Mg, 180 mg/L HCO3, and 150 mg/L. CO₂- all expressed as CaCO3. Determine the chemical dosages required to soften this water as much as possible without removing magnesium. What will the final hardness be? 1-8. If the water of P 7 is to be softened to a final hardness of 85 mg/L as CaCO, and is not to contain more than 25 mg/L. Mg as CaCO3, find the required chemical dosages. hinh will produce a water meeting the

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Pressurized pipe flow

A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?

Question

11-7. A water contains 200 mg/L Ca, 75 mg/L Mg, 180 mg/L HCO3, and 150 mg/L CO₂-
all expressed as CaCO3. Determine the chemical dosages required to soften this
water as much as possible without removing magnesium. What will the final
hardness be?
1-8. If the water of P7 is to be softened to a final hardness of 85 mg/L as
CaCO, and is not to contain more than 25 mg/L. Mg as CaCO3, find the required
chemical dosages.
1-9. Design a cation-exchange process which will produce a water meeting the
criteria of PT-8. Assuming the salt must be provided in an excess of 100
percent, how much salt would be used per year in a plant with a capacity of
5000 m³/day?
Solve 11-8 & 11-7 The manufacturer recom-

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