unevty mausecondary municipal wastewater effluent can be reused for variouspurposes. One such application is currently practiced at Water Factory 21 in OrangeCounty, California. Wastewater effluent (pH = 8) is treated by a number of processes,and the final product water is recharged into an aquifer with the main purpose ofcontrolling groundwater degradation due to seawater intrusion. One of the treatmentprocesses included in this plant is air stripping, a process in which volatile contaminantsare volatilized from water and transferred into air. Ammonia (pK,-9.3 at the designtemperature of 25°C) is one of the original target contaminants to be removed byvolatilization.(a) Indicate if pH adjustment is required prior to the wastewater entering the air strippingtower, and if so what type of adiustment you would recommend (pH increase ordecrease). Justify your answen(b) Indicate if the pH in the water exiting the air-stripping tower would tend to be higher,same, or lower compared to the adjusted influent water pH. Justify your answenrpoints)

Air stripping is the process of removing chemicals called volatile organic compounds or "VOCs.…

urposes. One such application is currently practiced at Water Factory 21 in Orange ounty, California. Wastewater effluent (pH = 8) is treated by a number of processe nd the final product water is recharged into an aquifer with the main purpose of ontrolling groundwater degradation due to seawater intrusion. One of the treatment rocesses included in this plant is air stripping, a process in which volatile contamin e volatilized from water and transferred into air. Ammonia (pK,-9.3 at the design mnerature of 25°C) is one of the original target contaminants to be removed by

urposes. One such application is currently practiced at Water Factory 21 in Orange ounty, California. Wastewater effluent (pH = 8) is treated by a number of processe nd the final product water is recharged into an aquifer with the main purpose of ontrolling groundwater degradation due to seawater intrusion. One of the treatment rocesses included in this plant is air stripping, a process in which volatile contamin e volatilized from water and transferred into air. Ammonia (pK,-9.3 at the design mnerature of 25°C) is one of the original target contaminants to be removed by

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 80AP

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1. A 0.3516 g sample of commercial phosphate detergent was ignited at a heat to destroy the organic matter. The residue was taken up in hot HCI which converted P to H3PO4. The phosphate was precipitated as MGNH4PO4.6H2O by addition of Mg+ followed by aqueous NH3. After being filtered and washed, the precipitate was converted to Mg2P2O7 by ignition at 1000 OC. This residue weighed 0.2161 g. Calculate the percent P (30.974) in the sample? Ans 17.11%
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o/index.html?deploymentld%=55750828934189288909969212&eiSBN=9781305657571&snapshotld%32199898&id%3... ☆ IDTAP Q Search this cou Use the References to access important values if needed for this question. The concentration of H3ASO3 in a solution is determined by titration with a 0.1945 M Ce+ solution. The balanced net ionic equation for the reaction is: 2Ce*(aq) + H3ASO3(aq) + 5H2O(1) 2Ce*(aq) + H3ASO4(aq) + 2H3O*(aq) (a) If 19.83 mL of the 0.1945 M Ce** solution are needed to react completely with 30.00 mL of the H3ASO3 solution, what is the concentration of the H3ASO3 solution? M (b) Which of the two solutions was in the buret during the titration? (c) Suppose at the end of the titration, the solution containing the Ce³* ion is transferred to a volumetric flask and diluted to 300. mL. What is the concentration of Ce3+In the diluted solution? Submit Answer 5 question attempts remaining
A sulfuric acid spill occurred on the highway after a truck containing barrels of sulfuric acid swerved out of control from a truck tire blowout. Luckily no one got hurt in the event but there is a concern that the sulfuric acid spill may affect local ground water supply. A sample of the ground water in that area was recovered to assess the extent of contamination of the ground water supply. In order to determine the concentration of sulfuric acid in the sample, 25.00 mL of the ground water sample was titrated with 0.133 M NaOH and you get the following data: Sodium hydroxide (initial buret reading) 0.66 mL Sodium hydroxide (final buret reading) 17.42 mL Calculate the molarity of sulfuric acid in the ground water sample. Enter numerical answer. Report in 3 sig figs. Show work
You are required to standardize a dilute solution of sulphuric acid, and undertake the following steps:(i) 4.805 g of solid sodium tetraborate (Na2B4O7) are added to a 250 mL volumetric flask, and the solution made up to the mark with distilled water.(ii) 25.00 mL aliquots of the stock solution from (i) are transferred to conical flasks, for titration against the sulphuric acid solution in the burette.(iii) You perform titrations using two different indicators: bromocresol green, and phenolphthalein.With bromocresol green, the average titre volume is 22.50 cm3, while with phenolphthalein, the average volume is 9.50 cm3.(a) Write the balanced equation for the reaction between Na2B4O7 and sulphuric acid
To analyze an aspirin sample, 0.3470 g of crushed tablets are weighed and treated with 50.00 mL 0.1155 M sodium hydroxide, boiling for 10 minutes. Under these conditions the acid acetylsalicylic (MW, 180) reacts according to: CH3COO-C6H4-COOH + 2 OH- → OH-C6H4-COO- + CH3COO- The excess NaOH is then titrated with 11.5 mL of 0.2100 M HCl. What is the purity of said show ?.
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3.) In the assay of NaHCO3, 3.0g of the solid is dissolved in 25mL water. What is the normality? How many mL of 1N H2SO4 will be required to neutralize this solution? From this volume of acid, compute the percent purity of NaHCO3.
1) How much total sea salt is present in a 95 Kg person? (a normal person (70 kg BW) has approximately 43L body fluid). 2) Please express the normal blood glucose level into molarity (mM). 3) Commercial HCl is 36%. Please convert it into molarity. 4) Find out the Volume (dm3) of product at STP when 0.28 M, 200 mL NaOH (aq.) reacts with 250 mL 85% H3PO4 (Sp. G.-1.067). 5) The above reaction has the product Ammonia, which when dissolved in 300 mL water makes an alkaline solution. Find its molarity (M). 6) Please re-calculate the child dose as per the BW of the baby. (Adult dose-750 mg and the BW of the baby is 50 lb (British pound) (1 lb=0.453 Kg).
. A wastewater treatment plant discharges 10 MGD effluent containing 200 mg/L ultimate BOD into a stream flowing at 90 MGD with ultimate BOD of 5 mg/L. The deoxygenation constant, kd, is 0.12/day. (a) What is the ultimate BOD (BOD) remaining in the stream at a distance of 10,000 m downstream if the stream flows at a constant speed of 0.10 m/s? (b) What should be the treatment plant effluent BOD. (CW) in mg/L if the ultimate BOD, at 10,000 m downstream cannot exceed 5 mg/L?