Determine the pH of a solution that contains 2*(10^-4) mg/L of OH- (at 25 degrees)
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Determine the pH of a solution that contains 2*(10^-4) mg/L of OH- (at 25 degrees).
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- d) Calculate total hardness in ppm of a solution of both 55 mg/L Al2(SO4)3 and 45 mg/L Mg(NO3)2.Please choose the correct answer for each question: 1. Activity of a gas in equilibrium with solution is ______? A. its partial pressure; B.1.0; C. its molar concentration; D. 0.0 2. During a sorption procedure, the substance transferred from the gas or liquid phase to the solid phase is called ______ A. sorbent; B. sorbate; C. partition; D. none of the above 3. When a chemical has a lower KOW, it is more ______ A. hydrophobic; B. hydrophilic; C. more absorbable; D. less absorbable 4. _____ occurs on the adsorbent surface A. Adsorption; B. Sorption; C. Absorption; D. Adsorption and absorption 5. _____ addresses the change in the amount of a substance of interest with time. A. The equilibrium approach; B. The kinetic approach; C. Henry’s Law; D. Freudlich isotherm equation1-7. 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 Prob. 11-7 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. Solve 11-7
- Ca+2 = 36.8mg/L Mg+2 = 2.9mg/L HCO3 = 98mg/L pH = 7.53 Temp = 9C Calculate the following: a. Hardness in units of mg/L as CaCO3 b. Ionic strength (be sure to include H++ and OH--) c. PCO2 in equilibrium with the sample d. Saturation index with respect to calcite (SIC) e. Saturation index with respect to dolomite (SID)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)Communicate the steps during the titration of a weak base with a strong acid. Explain the major concepts of titration and how to calculate the pH at any point on the curve.(Explain as if someone is learning the topic for the first time)
- ES C raudon . A water contains 200 mg/L Ca, 75 mg/L Mg, 180 mg/L HCO,, 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? letExample 2: NaCl equivalent concentration 20,000 ppm. Temperature of %3D concentration 75°F. Find the Resistivity of the solution.Q2: A drop of liguid foluen is kept al uniform temperkure t 299 K and is suspended in air by a fine wire. The initid radius at r= 2mm. The vapor pressure of foluene 299K is f=384 Kfe and the density of liguid toluene is 366 ky Im 3. Derive equation for the time tp for the drop b evupurete Completely in a large volume of still air Calculate the tine in seconds for Complete evaporahion.
- Chose the correct answer 1- The Unit measurement of suspended solids is ...A- kg 2- The Unit measurement of Turbidity is A- °C is B-m B-NTU C- mg/L C-K 3- The Unit measurement of pH www A-mg/L 4- The Unit measurement of alkalinity is .. 5-Non toxic metals includes 6-Dissolved materials size is lees than A- 10 mm D- none of above D- none of above D- none of above B- p.p.m C- g/m³ D- none of above A- m/sec B- m³/sec C- mg/L A-Chromium B- Mercury C- Calcium D- none of above B- 106, C-108 mm D- none of above mm 7- Public standards of Hardness in drinking water is A-500 mg/L B-50 mg/L C-100 mg/L D- none of above 8- Alkalinity species includes are A-HCO3 B-CO3 C- OH D-All of above ... 9- Dental cavities in children can prevented when Drinking water has Fluoride concentration of A- 0.1 mg/L B- 1 mg/L C- 10 mg/L D- none of above 10- Toxic metals are metals that harmful to humans even when exists in concentration of .. A- Small B-Large C-zero D- none of above1. When the force of 3 mN is applied to the plate the line AB in the liquid remains straight and has a velocity of 0.6x103 m/s. If the surface area of the plate in contact with the liquid is 0.6 m?, determine the approximate viscosity of the liquid. B B B' 3 mN 4 mm A11-7. 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-