I need solution in 15 minutes please. Q3//A/ 1- What is the osmotic pressure at 20 C of a 1Ldesigning an RO system to achieve a desired level of water purification?atm)/(K-mol) 2- What factors affect the osmotic pressure of a solution? 3- What factors would you consider whensolution containing( NaCl) 3.73% mass percent? R= 0.08206 (L-

Step 1:n=0.05763mol (from above)�=0.0821 L atm/mol KR=0.0821L atm/mol K�=20+273.15 KT=20+273.15K…

Answered: Q3//A/ 1- What is the osmotic pressure…

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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Example 4-7: Single-stage softening A water with the ionic characteristics shown in the bar diagram below is to be softened to the minimum calcium hardness by the lime-soda ash process. Magnesium removal is not deemed necessary. 1. Calculate the chemical requirements and solids produced in milliequivalents per liter. 2. Draw a bar diagram for the finished water. 3. For a flow of 25,000 m³/d, calculate the daily chemical requirement and the mass of solids produced. Assume that the lime used is 90 percent pure and the soda ash is 85 percent pure. mequiv/L mequiv/L co 1.0 Ca²+ нсо; 3.5 5.0 Mg²+ 6.0 so²- Na 8.0 8.0
Example 4-7: Single-stage softening A water with the ionic characteristics shown in the bar diagram below is to be softened to the minimum calcium hardness by the lime-soda ash process. Magnesium removal is not deemed necessary. 1. Calculate the chemical requirements and solids produced in milliequivalents per liter. 2. Draw a bar diagram for the finished water. 3. For a flow of 25,000 m³/d, calculate the daily chemical requirement and the mass of solids produced. Assume that the lime used is 90 percent pure and the soda ash is 85 percent pure. mequiv/L mequiv/L co 1.0 Ca²+ HCO3 3.5 5.0 Mg²+ 6.0 so²- Na 8.0 8.0
A tank contains 200 liters of fluid in wich 30 grams of salt in dissolved. Brine containing 1 gram of per liter is then pumped into the tank at a rate of 4 liter/minutes the well mixed solution is pumped out at the same rate. Find the number A(t) of grams of salt in the tank at time t.
An ion exchanger treats 1 MLD of water using an exchanger of capacity 100 kg/day/m3 with rate of flow being 0.5 m3/min/m2. Choose the correct statements assuming total hardness of water equal to 84 mg/1 as Cao. Total hardness of water is equal to 150 mg/l as CaCO3. Correct Option B Sodium Alumino - Silicates may be used as ion-exchanger. Correct Option lon exchanger can result in removing complete hardness. Correct Option Correct Option The height of ion exchanger required is 1.08 m if hardness of water is taken as 150 mg/1 as CacO3.
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An analysis of water from a surface source yields the following results: Ions Concentration (mg/l) Ca +2 Mg +2 HCO3 SO²- 60 18 91.5 96 The temporary hardness (as CaCO3) and permanent hardness (as CaCO3) present in the water are
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Consider an ideal refrigeration cycle that has a condenser pressure 1000 KPa and an evaporator temperature of -15° C. Determine the coefficient of performance of this refrigerator for the working fluids R-134a Property for: |hị, kJ/kg S2 = $1, kJ/kg K P2, MPa T2, °C h,, kJ/kg Wc=h2 - hj h; = h4, kJ/kg R-134a, B.5 T 2 3 %3D B = q/Wc *y - 'y = "b|
During a steady flow process, the pressure of the working substance drops from 200 to 20 psia, the speed increases from 200 to 800 ft/s the internal energy decreases 20 BTU/lb and the specific volume increases from 2 to 10 ft³/lb. No heat transferred. Determine the following: a)AKE in ft-lb;/Ibm b)APE in ft-lb/lbm c)AW: (flow work) ft-lb:/lbm d)AH in BTU e) Net work in hp for 15 lb/min of fluid (use mass flow rate for this item only)
2. In the figure shown, if the atmosphere pressure is 101.3 kPa and the absolute Pressure at the bottom of the tank is 300 kPa. What is the specific gravity of the unknown liquid. SAE Oil 2 s = 0.90 ---F ? 2.5m ---- Olive oil 2.5m s= 0.95 .--- Sea water 2 s= 1.03 Glycerine s= 1.26 --
In wastewater treatment the digestion of sludge produces a useful gas (carbon dioxide and methane), and consumes volatile solids. Assuming steady state conditions, let the feed solids be 4%, of which 60% are volatile solids, and the feed flow rate be 1 m*/s. The gas, methane and carbon dioxide, contains no solids. The supernatant solids are 4%, with 40% being volatile, and the digested sludge is at a solids concentration of 3%, with 60% volatile. Gas Ce=0 Feed sludge C,=4%,Qs =? C, = 4% (60% vol.) (40% volatile) 0O, = 1 m¥sec < _ o _ Cy= 3%,Qo=? (60% volatile ) a3 15 the flow rate of supernatant Q in m*/min:- hala)
5. In water and wastewater treatment processes a filtration device may be used to remove water from the sludge formed by a precipitation reaction. The initial concentration of sludge from a softening reaction is 2 percent (20,000 mg/L) and the volume of sludge is 100 m3. After filtration the sludge solids concentration is 35 percent. Assume that the sludge does not change density during filtration, and that liquid removed from the sludge contains no sludge. Using the mass balance method, determine the volume of sludge after filtration.

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