CHEE 4704 - Problem Set 2a - Solutions

4.21. A dilute aqueous solution of H SO, (Solution A) is to be mixed with a solution containing 90.0 wt% H2SO, (Solution B) to produce a 75.0 wt% solution (Solution C). Solution A Flowmeter A Analyzer Solution C 75% H,S0, Solution B 90% H,SO. Flowmeter B MIXER The flow rate and concentration of Solution A change periodically, so that it is necessary to adjust the flow rate of Solution B to keep the product H,SO, concentration constant. Flowmeters A and B have linear calibration plots of mass flow rate (in) versus meter reading (R), which pass through the following points: Flowmeter A: mA 150 lb/h, RA 25 %3D %3D 500 lbm/h, RA 70 %3D %3D Flowmeter B: mp = 200 lbm/h, Ry = 20 800 lbm/h, Rg 60 %3D The analyzer calibration is a straight line on a semilog plot of %H;SO4(x) on a logarithmic scale versus meter reading (R,) on a linear scale. The line passes through the points (x and (x (a) Calculate the flow rate of Solution B needed to process 300 lb/h of 55% H,SO, (Solution A), and the…

1000 kg/hr of a mixture of benzene (B) and Toluene (T) containing 50% benzene by mass is separated by distillation into two fractions. The mass flow rate of benzene in the top stream is 450 kg B/hr and that of Toluene at the bottom is 475 kg T/h. the operation is at steady. What is the mass fraction of benzene at the bottom stream? О а. 0.015 O b. 0.095 О с. 0.23 O d. 0.132

For the purpose of determination of agricultural pesticides in river water, 3.2 liters of river water were taken and extracted with 125ml of CCI4 solvent using a separating funnel. After shaking and reaching the state of equilibrium, if you know that the value of the distribution coefficient (KD) is equal to 20, the weight ratio of the pesticides in the boiling layer to the lower layer in the separating funnel?

Ex7; An aqueous solution of sodium hydroxide contains 20.0% NaOH by mass. It is desired to produce an 8.0% NaOH solution by diluting a stream of the 20% solution with a stream of pure water. Calculate the ratios (liters H20/kg feed solution) and (kg product solution/kg feed solution). F =? kg = 0.2 XNaOH P =? kg XH,0 = 0.8 F2 =? kg F2 = 0.08 kg Na0H/kg xH,0 = 0.92 kg H20/kg %3D 1

0 A too kmal/h stream that is 97 msle % Carbon tetrachlorice Ccc4) and 3 % Carbon disullide ccs) is to be recovered Prom the bottom of a distillation column. The feed to the column is 16 mole % CS, and 84 % Cc4, and 2 % of the cc4 enterirg the column is contained in the overhead stream leaving H top of 'the column- O a flow charf of the pocess and do the degree-of- Drae and label freedom analysis- Clculate the mass and mle fracklons of Ccl4 in the overhend stranm, and determine He malar Piow rates of cc4 & CS, in the overhend and feel streams

In liquid-liquid extraction process, the fraction of solute remaining in phase 1 after n extractions is given by the formula below: q" = V 1 V + KV A solute is transfered from water (100 mL) to ether (15 mL). If the distribution coefficient between water and ether is 0.5, and three extractions are performed, what fraction of the solute remains in the aqueous phase after these extractions? a. 0.012 b. 0.752 c. 0.930 12 d. 0.230

BC Broward Col x O Onelogin xe Expt. 6 pre-l xA "Expt. 7 Quiz X G .What is an x b ziprecruiter x O 12.628+ Par X E Login x + O File | C/Users/nerbs/Downloads/Expt.%207%20Quiz,%20Part%201.pdf 10 2) If absorptivity (the constant of how much light of a given wavelength the sample absorbs) and path length (how much solution there is for light to pass through) are the same, which is true for a Beer's Law solution? a) its concentration and absorbance are proportional b) its concentration and rate are proportional c) its absorbance and rate are proportional d) the solution is an alcoholic beverage

Gypsum (CaSO4) is a common percipitant in water desalination. CaSO4 <=> Ca2+ + SO42-     where Ksp=10-4.6. Assuming that:   [Ca2+]=2x10-2 M; [SO42-]=2x10-3M: a) Find Qsp or IAP for the given water b) Find the solubility index (SI) and determine whether CaSO4 is under, super, or at saturation in water. Feel free to make any assumptions you wish, as long as they're stated.

令 。 B/s 因 1:Y9 404 2_543841247.. Use of the Normal Law Normality (N) = Wt /Eq.wt 1000/V(ml) Wt (gm) =Weight of sodium carbonate V (ml) = solution volume N= Normality Discussion: 1. What is the equivalent weight of the vehicle? primary standard? 2. Why is sodium carbonate 3- Attend naciN 3.3 solution in a 253 mi volume bottle. 4- Calculate the caliber of sodium carbonate if the weight of sodium carbonate gm 2 and the size of the bottle volume is 100ml Results Sheet Name: Group: Date: Signature 1-Calculations: 2-Aim of experiment: 3-Theoretical results M(Na2Co3).. .. Weight required= 4-Observations: 个

A liquid mixture containing 40.0% benzene (B) and 60% toluene (T) by mass to the distillation column. The upper product stream contains 90 mol% B, and the lower product stream contains 6% of the benzene fed into the column (meaning that 94% of the benzene is left with the upper product). The volumetric flow rate of the feed is 2500 1/ hr and the specific gravity of .the feed mixture is 0.870 A- Rate of mass accumulation B- Component balance equation . The accumulation terms (d/ dt), can also be diminished to zero by assuming steady state

How many mL of a 12.5 M solution are needed to make 100 mL of a 1.30 M solution? Your Answer: Answar units

(17 (17 /courses/159861/files?preview=69941104 G Gmail Frage b Ac (PISU Fil الولايات المتحدة الفن @ Science Problem Set 2.pdf W- # 2 r 3 S»>> F2 Dissolved substances Az+ H* Solid substances Az Az₂O Liquid substances H₂O E (a) 0.991 V Why You Don't Ne... 80 F3 $ DS Page of 2 Arizonium (Az) is a newly discovered element. Below is a Table listing the chemical potentials at 300 K of the A+ cation and the Az₂O oxide. A t 4 (a) 5.5 E R 6. Determine the standard potential (Az* = 1M) for the reaction: Az* +e™ = Az (a) 0.400 V. (b) 0.500 V (c) 0.700 V (d) 0.800 V 7. Determine the standard potential for the reaction: Az₂O + 2H+ + 2e = 2Az +H₂O (b) 0.701 V (c) 0.698 V (d) 1.203 V F 000 000 8. Calculate the equilibrium constant, K, for the chemical reaction:2Az* + H₂O=Az₂O + 2H+ (a) 10-11.3 (b) 10-10.1 (c) 10-6.0 (d) 10-16.4 9. Determine the pH value at which the potential for the two reactions, Azt +e=Az and Az₂O + 2H+ + 2e = 2Az +H₂O, intersect. (b) 6.2 1¹9 ق % 5 O Juj M Int μº chemical…

Countercurrent Multistage Washing of Ore. A treated ore containing inert solid sulfate is to be leached in a countercurrent multistage gangue and copper extractor using pure water to leach the CuSO4. The solid charge rate per hour consists of 10000 kg of inert gangue (B), 1200 kg of CuSO, (solute A), and 400 kg of water (C). The exit wash solution is to contain 92 wt % water and 8 wt % CuSO4. A total of 95% of the CuSO, in the inlet ore is to be recovered. The underflow is constant at N Calculate the number of stages required. 0.5 kg inert gangue solid/kg aqueous solution.

What is the percentage of organic compound that is dissolved in soil pore water that has a porosity of 0.41 and the Kd = 563 L kg-1 ? Report your answer in percentage and enter it is X.Xx10(-X) or X.Xx10(X)

A 100 g soil containing 20% smectitie mineral matter was mixed with 150 mL solution containing 0.10 M Pb. CEC of pure smectitie is 110 emol(+)/kg. CEC of the soil (cmol(+)/kg) is:

20 aspirin tablets labeled 80mg were dissolved in 100mL of 90% ethanol. A 10mL aliquot was taken and was used for assay. The analyte followed usual process and was treated with 50mL of 0.1000N NaH and was titrated with 35mL 0.1050N H2O4 until the solution achieved completion. Calculate the % content of the total aspirin capsules and the actual label claim

The aqueous solution of acetic with a flow rate of 1000 kg/hr contains 30% acetic acid by mass and will be extracted in a countercurrent multistage process with pure isopropyl ether (IPE) to reduce the acetic acid concentration in the final raffinate phase (LN) to 2% by mass. a) Calculate the minimum solvent flow. b) Determine the theoretical number of steps required when using a solvent of 1.5 minimum solvent flow rate. c) Determine the number of theoretical steps using the McCabe-Thiele method. Chart. Acetic acid (A)-Water (B)-isopropyl ether (IPE) (C) LIQUID-Liquid Balances at 1 atm pressure and 293 K Water layer (%) Water (B) Isopropyl ether layer (%) Water (B) 0.6 Acetic acid (A) IPE (C) Acetic acid (A) IPE (C) 98.8 1.2 99.4 99.3 98.9 0.69 98.1 1.2 0.18 0.5 1.41 97.1 1.5 0.37 0.7 2.89 95.5 1.6 0.79 98.4 91.7 1.9 1.0 97.1 6.42 13.30 25.50 36.70 1.9 93.3 4.82 11.40 2.3 84.4 71.1 3.4 3.9 84.7 71.5 21.60 31.10 58.9 4.4 6.9 58.1 48.7 10.6 10.8 45.1 37.1 44.30 46.40 16.5 36.20 15.1…

Kide solution. Trial 1 Trial 2 Trial 3 ,4 28.01 49,6041.10 28.0123,3O to'9 Ĉ 2.89x1041,963.0 21.6 4,65 31717 rity of NAQH solution:

A feed mixture containing 50 wt% n-heptane and 50 wt% methyl cyclohexane (MCH) is to be separated by liquid-liquid extraction into one product containing 92.5 wt% methylcyclohexane and another containing 7.5 wt% methylcyclo- hexane. Aniline will be used as the solvent. (a) What is the minimum number of theoretical stages necessary to effect this separation? (b) What is the minimum extract reflux ratio? (c) If the reflux ratio is 7.0, how many theoretical contacts will be required? Liquid-liquid equilibrium data for the system n-heptane-methyl cyclohexane-aniline at 25°C and at 1 atm (101 kPa) Hydrocarbon Layer Solvent Layer Weight percent MCH, solvent- free basis Pounds aniline/ pound solvent- free mixture Pounds aniline/ Weight percent MCH, solvent- free basis pound solvent- free mixture 0.0 0.0799 0.0 9.9 20.2 23.9 0.0836 0.087 0.0894 15.12 13.72 11.5 11.8 33.8 37.0 50.6 60.0 11.34 36.9 0.094 9.98 9.0 8.09 44.5 0.0952 0.0989 0.1062 50.5 67.3 66.0 76.7 84.3 88.8 6.83 74.6 79.7 82.1…

Problem 4. A field site in Pensacola, FL, is contaminated with creosote compounds (a wood preservative) in a nonaqueous phase liquid (NAPL) source. The mole fraction of phenol in the creosote is 3.2 x 104 mole phenol/mole creosote. Assume that the NAPL source material in extends vertically to the groundwater-unsaturated zone interface at the site. Estimate the partial pressure of phenol (atm) in the soil gas immediately above the NAPL, assuming the system is at equilibrium. Note: Phenol MW = 94 g/mol, vapor pressure = 0.00026 atm at 25°C.

Mganga is doing a routine analysis in a copper plating factory. He is regularly making up solutions of verypure CuSO4.5H2O. He suspect that a batch of a reagent used to make up a stock solution of CuSO4.5H2Ois impure and it may contains some CuCl2. He asked you to determine the percentage impurity as follows:Dissolve1.500g of a mixture and make up to 1.00L mark.150mL of this solution was treated with 20.00mLof 0.100M AgNO3 to remove 98.6% of chloride as AgCl precipitate.

Q3/ The solubility of sodium chloride NaCl in water at 290 K is 35.8 kg / 100 kg of water. Express the solubility as the following: 1- Mass fraction and the mass percent of NaCl 2- Mole fraction and mole percent of NaCl 3- kmol of NaCl per 1000 kg of water Note: molecular weight of NaCl = 135. 8, and water = 18.016 04/Aton ctroom of a dictillation col.umn uns docignod to romoue O504ofthe amount of componont

Tirofiban (C22H36N2O5S MWt = 440.6) is present as tirofiban HCI monohydrate (C22H36N2O5S.HCI.H₂O MWt=495.1) at 0.281 mg/mL in a concentrated solution. A solution for infusion is prepared by extracting 50 mL from a 250 mL bag of 5% glucose solution and adding 50 mL of concentrated solution. Sofia who weighs weighs 87 kg requires a tirofiban dose of 0.1 mcg/kg/min for 12 to 24 hours. What would the infusion rate be (mL/h)? (Answer to 1 decimal place.) Answer: 125.28 X

> EL session.masteringchemistry.com MasteringChemistry ROSTER-2019-SPRI-PULLM-CHEM-101 blackboard wsu Google Search MasteringChemistry: HW 8 KHW 8 Applications for Dilution Calculations K8 of8 Dilution as a procedure in analysis We sometimes purposely dilute solutions if the analyte concentrations wavelengths in the visible (and sometimes uitraviolet) range. Based on the dissolved solute's properties, we can quantify that solute's concentration are too high to permit an accurate measurement. For example, a spectrophotometer can measure the amount of light that passes through a sample solution for If the solute's concentration is too high, a relatively small amount of incident light having the wavelength that corresponds to the solute's absorption behavior will less light is absorbed, and the detector in the spectrophotometer can generate more reliable data. reach the dete ctor, which results in an inaccurate measurement (consider the result if you blocked the light with an opaque…

POin Elevation Aselution in preparnd by dissolving 15.60gof ordinary ger (sueroe, CHO, molecular weight-342 amu) in 15.00 gof water Calculante the boiling peier of the solution Sacose i anovolatile nonelectrolyte Solvent TC) THC) rCkg/mal) rChg/moll Benzene, Cal 80.1 253 55 530 Camphor, Cato 204 176 37.7 Cyciohexane, CH B0.88 2.79 6.50 202 Nitrobenzene, Cll, NO, 2108 524 81 water, H0 100.0 0.00 Submit Sho A h E Try A

(c) The ore being placed on the heap has an average copper grade of 1.0% and the lixiviant addition rate is 900 m3 /hr. 5% of the liquid is lost through evaporation and other loses and the pregnant solution contains an average of 2.1 kg Cu/m³. The solvent extraction stage recovers 90% of this copper, with the barren solution having additional acid and water added to make up for the lost volume and consumed material before being added back onto the heap. What is the average recovery of the copper from the heap leaching assuming no losses in the SX/EW?

1) 1500 kg mixture contains 15% acetone, 75% water and 10% Acetic acid by weight. a) Calculate the total mole of mixture and molar fractions of each compound. b) Calculate Average Molecular Weight of mixture. c) 2 kmol more Acetic acid is added to the mixture. What would be the mass fractions of this new mixture? (MW: Acetone= 58 g/mol Water= 18 g/mol Acetic acid= 60 g/mol)

You wish to undertake a 100 step countercurrent extraction of solutes A & B with distribution coefficients D= 1.5 & Da - 0.6. Suppose the volumes of mobile and stationary are equal. If fractions 28-40 and 50-68 are each pooled find the % recovery and purity of each solute. AA 79.8% recovery of 99.7% pure A B: 82.0% recovery of 86.6% pure B B. A: 72.7 % recovery of 97.0% pure A B: 89.0 % recovery of 98.9 % pure B OC.A: 82.6% recovery of 92.3% pure A B: 82.9% recovery of 91.0% pure B O D.A 92.6% recovery of 99.5% pure A 8: 67.0% recovery of 100 % pure B

If 30.0 mL of water that is 0.0500 M in Q is to be extracted with four 10.0-mL portions of an immiscible organic solvent, what is the minimum distribution coefficient that allows transfer of all but the following percentages of the solute to the organic layer: a 2.00 x 10-4 Distribution coefficient : b2.00 x 10-3 Distribution coefficient C2.00 x 10-² Distribution coefficient Submit Answer = Retry Entire Group

12.10-3. Countercurrent Multistage Washing of Ore. A treated ore containing inert solid gangue and copper sulfate is to be leached in a countercurrent multistage extractor using pure water to leach the CUSO,. The solid charge rate per hour consists of 10000 kg of inert gangue (B), 1200 kg of CuSO, (solute A), and 400 kg of water (C). The exit wash solution is to contain 92 wt % water and 8 wt % CuSO4. A total of 95% of the CUSO, in the inlet ore is to be recovered. The underflow is constant at N = 0.5 kg inert gangue solid/kg aqueous solution. Calculate the number of stages required.

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A 3 m^3 drum contains a mixture at 101 KPa and 35 C of 60% Methane (CH4) and 40% oxygen (O2) on a volumetric basis. a. Determine the amount of oxygen that must be added at 35 C to change the volumetric analysis to 50% of each component.