What is cloud point of a nonionic ethylene oxide based polymer? a. Temperature above which polymer...
What is cloud point of a nonionic ethylene oxide based polymer?
| a. |
Temperature above which polymer remains homogeneous as a solution |
|
| b. |
Temperature above which solubility increases significantly |
|
| c. |
Temperature above which polymer solution phase separates into 2 phases |
|
| d. |
Temperature below which the polymer phase separates into 2 phases |
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What is cloud point of a nonionic ethylene oxide based
polymer?
a.
Temperature above which polymer...
b. You have prepared a solution of water-soluble polymer, and wish to isolate the polymer from...
b. You have prepared a solution of water-soluble polymer, and wish to isolate the polymer from the water by freeze drying it. This process involves two steps: i) The temperature of the solution is dropped at ambient pressure to a temperature below water's triple point. ii) The pressure of the frozen solution is reduced until water spontaneously leaves the system With this above in mind, sketch a phase diagram of water showing regions of stability in its solid, liquid, and...
9) An increase in the temperature of a solution usually A) increases the boiling point. B)...
9) An increase in the temperature of a solution usually A) increases the boiling point. B) increases the solubility of a gas in the solution. C) increases the solubility of a solid solute in the solution. D) decreases the solubility of a solid solute in the solution. E) decreases the solubility of a liquid solute in the solution. 10) The solubility of Kl is 50 g in 100 g of H20 at 20°C. If 110 grams of Kl are added...
Describe what happens if an alloy with the eutectic composition is cooled from just above to just...
Not sure about the questions please answer.
1A)
1b)
1C
Describe what happens if an alloy with the eutectic composition is cooled from just above to just below the eutectic temperature What is the solubility of tin in lead at 160 degrees C? Select one: 0 a. 1 2 at% b. 18.3 at% c, 20 at% O d. zero Which of the following is true for a mixture of elements in a solid? Select one: a. A mixture of elements...
The triple point on a phase diagram identifies: a. The conditions in which a phase can...
The triple point on a phase diagram identifies: a. The conditions in which a phase can exist at three pressures. b. The temperature above which the supercritical fluid exists. c. The conditions in which three phases co-exist. d. The conditions in which a phase can exist at three temperatures. e. The conditions in which the melting point, freezing point, and boiling point coincide. In the phase diagram below, which is the gas to solid transition? Select one: a. A to...
2. Briefly explain how the solubility of most salts is related to temperature. What general trend...
2. Briefly explain how the solubility of most salts is related to temperature. What general trend is observed, and why? 3. What factors determine the solubility of a salt in water? Explain. 4. A student is evaluating the solubility of potassium chlorate (KCIO) at various temperatures. She dissolves 2.50 g of KCIO, in a total volume of 7.5 ml of water. a. Calculate the concentration of KCIO, in this solution, b. The student heats the solution up to 80°C and...
2. [20pt] Consider the temperature-composition phase diagram shown below, which represents a solid-liquid equilibrium based on...
2. [20pt] Consider the temperature-composition phase diagram shown below, which represents a solid-liquid equilibrium based on a (liquid) mixture of A and B at high temperature. Temperature, T DY 0.16 0.23 0.57 0.67 0.84 0.2 0.8 0.4 0.6 Mole fraction of B, XE (a) Label all regions of the diagram according to the chemical species exist in that region and their phases. Be precise the composition of solid formed. (10pt) (b) Indicate the number of species and phases present at...
Based on the figure above, the boiling point of diethyl ether under an external pressure of...
Based on the figure above, the boiling point of diethyl ether
under an external pressure of 0.590 atm is ________°C.
a 20
b 0
c 60
d 30
34.6°C 78.3 °C 100 °C 800 760 Normal boiling point 600 Vapor pressure (tor) Diethyl ether Water 400 Ethyl alcohol (ethanol) 200 Ethylene glycol 0 0 20 80 100 40 60 Temperature (°C)
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have...
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have the same solubility? Solubility Curve Grams of solute/100g H30 to .- 30. 0 10 70 80 90 100 20 30 40 50 60 Temperature (°C) O 93°C 56°C O 85°C 0750 Previous Page Next Page Page 2 of 24 Question 2 (1 point) Saline (salt) solution is 0.9% by mass which is similar to tears, blood, and other body fluids. Which of the following...
1. Which of the following compounds should be soluble in CC14? a) Naci b ) H20...
1. Which of the following compounds should be soluble in CC14? a) Naci b ) H20 c) NaOH d) C3H18 e) None of these 2. with increasing CO2 pressure and_ with The solubility of carbon dioxide gas in water increasing temperature. a) increases, increases b) increases, decreases c) decreases, increases d) decreases, decreases e) remains constant, decreases 3. Pressure . Based on the Raoult's Law plot for a mixture of liquids A and B shown on the right, which of...
16. The the following questions refer to above phase diagram. (6 pts.) a. What process in...
16. The the following questions refer to above phase diagram. (6 pts.) a. What process in moving from A occurs to C? Temperature b. What is the intersection at D called? c. Which letter is the liquid phase? d. What process occurs to the right of point D as pressure increases? e. What process occurs if you increase pressure on the solid? 1. If one atmosphere of pressure is higher than D. what happens when the solid is heated?
b. You have prepared a solution of water-soluble polymer, and wish to isolate the polymer from the water by freeze drying it. This process involves two steps: i) The temperature of the solution is dropped at ambient pressure to a temperature below water's triple point. ii) The pressure of the frozen solution is reduced until water spontaneously leaves the system With this above in mind, sketch a phase diagram of water showing regions of stability in its solid, liquid, and...
9) An increase in the temperature of a solution usually A) increases the boiling point. B) increases the solubility of a gas in the solution. C) increases the solubility of a solid solute in the solution. D) decreases the solubility of a solid solute in the solution. E) decreases the solubility of a liquid solute in the solution. 10) The solubility of Kl is 50 g in 100 g of H20 at 20°C. If 110 grams of Kl are added...
Not sure about the questions please answer.
1A)
1b)
1C
Describe what happens if an alloy with the eutectic composition is cooled from just above to just below the eutectic temperature What is the solubility of tin in lead at 160 degrees C? Select one: 0 a. 1 2 at% b. 18.3 at% c, 20 at% O d. zero Which of the following is true for a mixture of elements in a solid? Select one: a. A mixture of elements...
2. Briefly explain how the solubility of most salts is related to temperature. What general trend is observed, and why? 3. What factors determine the solubility of a salt in water? Explain. 4. A student is evaluating the solubility of potassium chlorate (KCIO) at various temperatures. She dissolves 2.50 g of KCIO, in a total volume of 7.5 ml of water. a. Calculate the concentration of KCIO, in this solution, b. The student heats the solution up to 80°C and...
2. [20pt] Consider the temperature-composition phase diagram shown below, which represents a solid-liquid equilibrium based on a (liquid) mixture of A and B at high temperature. Temperature, T DY 0.16 0.23 0.57 0.67 0.84 0.2 0.8 0.4 0.6 Mole fraction of B, XE (a) Label all regions of the diagram according to the chemical species exist in that region and their phases. Be precise the composition of solid formed. (10pt) (b) Indicate the number of species and phases present at...
Based on the figure above, the boiling point of diethyl ether
under an external pressure of 0.590 atm is ________°C.
a 20
b 0
c 60
d 30
34.6°C 78.3 °C 100 °C 800 760 Normal boiling point 600 Vapor pressure (tor) Diethyl ether Water 400 Ethyl alcohol (ethanol) 200 Ethylene glycol 0 0 20 80 100 40 60 Temperature (°C)
Question 1 (1 point) Using the solubility curve, at which temperature do KCl and KCIO, have the same solubility? Solubility Curve Grams of solute/100g H30 to .- 30. 0 10 70 80 90 100 20 30 40 50 60 Temperature (°C) O 93°C 56°C O 85°C 0750 Previous Page Next Page Page 2 of 24 Question 2 (1 point) Saline (salt) solution is 0.9% by mass which is similar to tears, blood, and other body fluids. Which of the following...
1. Which of the following compounds should be soluble in CC14? a) Naci b ) H20 c) NaOH d) C3H18 e) None of these 2. with increasing CO2 pressure and_ with The solubility of carbon dioxide gas in water increasing temperature. a) increases, increases b) increases, decreases c) decreases, increases d) decreases, decreases e) remains constant, decreases 3. Pressure . Based on the Raoult's Law plot for a mixture of liquids A and B shown on the right, which of...
16. The the following questions refer to above phase diagram. (6 pts.) a. What process in moving from A occurs to C? Temperature b. What is the intersection at D called? c. Which letter is the liquid phase? d. What process occurs to the right of point D as pressure increases? e. What process occurs if you increase pressure on the solid? 1. If one atmosphere of pressure is higher than D. what happens when the solid is heated?
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