4. Use the table below to calculate the following:The concentration (in mg/L and mol/L) of the coagulant active ingredient (Al2(SO4)3) in the stocksolution (NOT the concentration of the hydrated form, which has been provided)The coagulant feed rate (in L/day) required to achieve target concentrationThe alkalinity consumed in the mixed water by coagulant addition (in mg/L as CaCO3). Thestock solution does not contain any excess alkalinity.CoagulantStock Solutionconcentration inPlant Flowmixed water(mgd)ConcentrationSpec. Gravity(mgAl2(SO4)3)/L)6.52126% Al2(SO4);•14H2O1.28

Calculate formula weights (FW) for Al2O3 and Al2(SO4)3.14H2O Take molecular weight of Al=27 g/mol,…

Answered: Use the table below to calculate 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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Question

4. Use the table below to calculate the following:
The concentration (in mg/L and mol/L) of the coagulant active ingredient (Al2(SO4)3) in the stock
solution (NOT the concentration of the hydrated form, which has been provided)
The coagulant feed rate (in L/day) required to achieve target concentration
The alkalinity consumed in the mixed water by coagulant addition (in mg/L as CaCO3). The
stock solution does not contain any excess alkalinity.
Coagulant
Stock Solution
concentration in
Plant Flow
mixed water
(mgd)
Concentration
Spec. Gravity
(mgAl2(SO4)3)/L)
6.5
21
26% Al2(SO4);•14H2O
1.28

Expert Solution

Step 1

Calculate formula weights (FW) for Al₂O₃ and Al₂(SO₄)₃.14H₂O

$T a k e m o l e c u l a r w e i g h t o f A l = 27 g / m o l, O = 16 g / m o l, S = 32 g / m o l a n d H = 1 g / m o l 1 . F W : A l_{2} O_{3} = 2 (27) + 3 (16) = 102 g / m o l 2 . F W : A l_{2} {(S O_{4})}_{3} . 14 H_{2} O = 2 (27) + 3 (32) + 26 (16) + 28 (1) = 594 g / m o l$

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