7. The crude oil is fed to a washing unit and in this unit it is mixed with fresh water fed to the washing unit. Crude oil contains salt and oil. There are two exit streams from washing unit. The first stream is the oil stream. The oil stream contains 5% salt but not water. The second stream is "spent wash water" stream. This stream contains 15% salt and the balance water. The mass ratio of crude oil to fresh water used is 4:1. All compositions are given on mass basis. a) Draw and label a flowchart to this process b) Do the degree of freedom analysis. Prove that for an assumed basis of calculation, flow rate and compositions of all process streams can be calculated from the given information. c) Calculate flow rate and compositions of all process streams for 100 kg of oil stream taken as product.

7. The crude oil is fed to a washing unit and in this unit it is mixed with fresh water fed to the washing unit. Crude oil contains salt and oil. There are two exit streams from washing unit. The first stream is the oil stream. The oil stream contains 5% salt but not water. The second stream is "spent wash water" stream. This stream contains 15% salt and the balance water. The mass ratio of crude oil to fresh water used is 4:1. All compositions are given on mass basis. a) Draw and label a flowchart to this process b) Do the degree of freedom analysis. Prove that for an assumed basis of calculation, flow rate and compositions of all process streams can be calculated from the given information. c) Calculate flow rate and compositions of all process streams for 100 kg of oil stream taken as product.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter4: Energy And Chemical Reactions

Section: Chapter Questions

Problem 123QRT

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You obtain an Unknown Sample from the Stockroom. You begin testing the solution through the steps outlined in the flowchart of the experiment’s PDF file. You first add HCl and centrifuge your mixture. You observe the formation of a white precipitate in the bottom of the test tube. After pouring off the supernatant liquid, you add hot water to the white precipitate. Addition of the hot water dissolves some of the precipitate, but some white precipitate still remains on the bottom of the test tube. You pour off the supernatant liquid, and add ammonia (NH3) to the remaining precipitate. You now observe the formation of a gray-black precipitate. Which of the following is a valid conclusion to draw at this point? Select one: Hg22+ is definitely present. Pb2+ is definitely present. Ag+ could be present, or Hg22+ could be present, or BOTH could be present. Ag+ is definitely present
You obtain an Unknown Sample from the Stockroom. You begin testing the solution through the steps outlined in the flowchart of the experiment’s PDF file. You first add HCl and centrifuge your mixture. You observe the formation of a white precipitate in the bottom of the test tube. After pouring off the supernatant liquid, you add hot water to the white precipitate. Addition of the hot water dissolves some of the precipitate, but some white precipitate still remains on the bottom of the test tube. Which of the following is a valid conclusion to draw at this point? Pb2+ is definitely present. Hg22+ is definitely present. Ag+ could be present, or Hg22+ could be present, or BOTH could be present. Ag+ is definitely present
1. In a process of concentrating 1000 kg/hr of freshly extracted juice (orange) containing 12.5% solids, the juice is strained yielding 800 kg/hr of strained juice and 200 kg of pulpy juice. The strained juice is concentrated in an evaporator to give an evaporated juice of 58% solids. The pulpy juice is bypassed around the evaporator and mixed with the evaporated juice in a mixer to improve the flavor. This final concentrated juice is 42% solids. Calculate a) the solids concentration in the strained juice b.) the kg/hr of final concentrated juice and c) the concentration of solids in the pulpy juice bypassed.
K An oil company needs to fill orders for 91-octane gas, but only has 88- and 92-octane gas on hand. The octane rating is the percentage of isooctane in the standard fuel. How many liters of 88-octane gas should be mixed with 300 liters of 92-octane gasoline to get a mixture that is 91-octane gas? Let x be the amount of 88-octane gas used in the mixture. Complete the following chart. Type of Gas 88-octane 92-octane Mixture Quantity X 300 x+300 % Isooctane 88% 92% 91% Amount of Isooctane 0.91 (Simplify your answers. Use integers or decimals for any numbers in the expression.)
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The solubility of a substance is 30 g per 100 mL of water at room temperature, 50 g per 100 mL of water at 80 ∘C. A student mixed 40 g of this substance with 100 mL of water at room temperature (stage 1), and then heated the mixture to 80 ∘C (stage 2). The mixture is then slowly cooled down to room temperature without any precipitation (stage 3). Finally, the student added a small crystal to the mixture and saw precipitation took place. This mixture is supersaturated at stage 2 heterogeneous at stage 1 homogeneous at stage 4 saturated at stage 3
A 25.0 ml aliquot of a well-shaken and filtered sample of river water is pipetted into an evaporating dish. The sample was heated to dryness. Determine the concentration of Total Dissolved Solids (TDS) in mg/L given the following data: Mass of evaporating dish = 25.5 g Mass of dried sample plus evaporating dish = 25.9729 g Note: Round off your answer to the nearest whole number.
How many grams of sodium acetate are in solution in the third beaker? Express your answer as an integer.
A mixer containing 100 gal of Na,SO, solution (4 lbs of Na2504 per gal) is attached to a reservoir containing a solution of 1 Ib of Na,SO4/gal. If the solution is pumped from the reservoir at the rate of 5 gal/min and the mixed solution runs out of the mixer at the rate of 5 gal/min, how long will it take to reduce the concentration of salt in the tank to 1/2 its original value?