Question 7 Given the phase diagram of mixture A and B both are solid where the mixture is heated until both are at liquid phase liquid phase. 90 80 70 60 50 40 30 20 10 100 B 50 100 A % composition Which phase is described by the given conditions 25 % of A and 75 % of B at 65°C A. Eutectic point of A+B B. Solid A + Solution (A+B) 65% A and 35% B at 53°C C solid B + liquid A 66% A and 34% of B at 32 °c D. Solution of A+B 50% A and 50% B at 70°c E, Solid A + Liquid B Temperature (°C)

Question 7 Given the phase diagram of mixture A and B both are solid where the mixture is heated until both are at liquid phase liquid phase. 90 80 70 60 50 40 30 20 10 100 B 50 100 A % composition Which phase is described by the given conditions 25 % of A and 75 % of B at 65°C A. Eutectic point of A+B B. Solid A + Solution (A+B) 65% A and 35% B at 53°C C solid B + liquid A 66% A and 34% of B at 32 °c D. Solution of A+B 50% A and 50% B at 70°c E, Solid A + Liquid B Temperature (°C)

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter13: Solutions And Their Behavior

Section13.5: Colloids

Problem 1.3ACP

See similar textbooks

Similar questions

Describe the phase changes that take place when a liquid mixture of 4.0 mol B2H6 (melting point 131 K) and 1.0 mol CH3OCH3 (melting point 135 K) is cooled from 140 K to 90 K. These substances form a compound (CH3)2OB2H6 that melts congruently at 133 K. The system exhibits one eutectic at x(B2H6) = 0.25 and 123 K and another at x(B2H6) = 0.90 and 104 K.
Given the following mixture of two compounds 30.00 g of X (liquid) (MW =58.00 g/mol)(density 1.088 g/mL) and 880.00 g of Y (50.00 g/mol))(density 0.808 g/mL), calculate the mass percent of X. Given the following mixture of two compounds 35.00 mL of X (MW =80.00 g/mol)(density 0.945 g/mL) and 735.00 mL of Y (80.00 g/mol))(density 0.810 g/mL). The vapor pressure of pure Y is 47.00 torr. Calculate the vapor pressure of the solution.
The table below shows temperature/composition data collected for a mixture of methylbenzene (M) and octane (O) at 1 atm. Recall that x stands for the mole fraction in the liquid and y stands for the mole fraction in the vapor in equilibrium. The boiling points for methylbenzene (M) and octane (O) are 110.60C and 125.60C, respectively. Construct the phase diagram with Temperature vs. xM. What is the composition of the vapor in equilibrium with the liquid of composition (a) xM = 0.250 and (b) xO = 0.250. T (0C) 110.9 112.0 114.0 115.8 117.3 119.0 121.1 123.0 xM 0.908 0.795 0.615 0.527 0.408 0.300 0.203 0.097 yM 0.923 0.836 0.698 0.624 0.527 0.410 0.297 0.164
A liquid mixture consists of 3.0 mol of compound A, with melting point of 144 K, and 2.0 mol of compound B, with melting point of 125 K. These substances form a compound AB, which melts congruently at 134 K. The system exhibits one eutectic at x(A) = 0.25 and 110 K and another at x(A) = 0.85 and 102 K. Describe the phase changes taking place when the liquid is cooled from 150 K to 70 K.
1. An organic student did an experiment extracting benzoic acid from a mixture of other organic substances. Other analyses of the obtained sample confirmed the presence of benzoic acid. The student also measured the melting point of the white solid, 117.4-121.6 oC. The literature mp of benzoic acid is 122.3oC. What can you conclude about the sample? Select one. Group of answer choices The sample of benzoic acid contains soluble impurities. The student obtained a good yield of benzoic acid. The sample of benzoic acid contains insoluble impurities. The student obtained pure benzoic acid from the extraction. The student obtained a poor yield of benzoic acid. 2. Which phenomenon are sometimes confused with melting during mp analysis? Select all that apply. Group of answer choices decomposition cracking shaking sagging/shrinking sweating solidifying 3. Study the bond types in the compound shown. Select the type(s) of intramolecular force(s) you predict the substance to exhibit. Select all…
A student determined the molar mass of an unknown ionic solid by the method used in this experiment. She found the equilibrium temperature of the ice water mixture (THE FREEZING POINT) to be 0.50°C on her thermometer. When she added 3.10 g of her solid to the mixture, the temperature fell to -4.30°C. She then poured off the solution into a beaker. The mass of the solution was 34.59 g. Kf = 1.86°C/m What was the freezing point depression ∆Tf (celsius) What was the molality of the unknown solution? How much water was in the solution? What did she find to be the observed molar mass of the ionic solid, assuming she made the calculation properly?
4.) What is the boiling point of pure (glacial) acetic acid?5.) The boiling point of water is.6.) An acetic acid solution having 20mol% water is expected to boil at what temperatre?7.) What is the mol fraction of acetic acid vapor and water vapor that is expected to boil off from a liquid mixture containing exactly 20mol% water.8.) The mol fraction of liquid water in a mixture with acetic acid that produces an initial vapor phase composition of 80mol% water and 20mol% acetic acid.
3.1 Calculate the volume of concentrated (98% v.v) H2SO4 that you will need to prepare 250ml of an 5.4 M H2SO4 solution. Density of 98% v.v H2SO4 = 1.84 g/cm3
TRUE OR FALSE: 1. Solids such as naphthalene when heated will pass thru a process called condensation prior to sublimation when being purified. 2.If water and n-propyl alcohol were mixed, the separation of individual components is possible with steam distillation because these two have a wide range of boiling point difference. 3. When an impurity in the synthesized camphor such as sodium chloride is present, the sublimation technique cannot be used to purify the camphor due to the nature of NaCl. 4. Organic solvents such as hexane or ether are an excellent medium to recrystallize an impure benzoic acid 5. In caffeine extraction, it is important that the tannic acid component of coffee be converted to its free acid state to avoid any interference with the extraction of caffeine
Describe a binary eutectic diagram and show all phase regions with all the relevant information for each.
If 10.0mL of H2SO4 (specific gravity=1.50 containing 48.7% of combined SO3 by weight) is diluted to 400mL, what is the normality of the solution as an acid? 1.52 x 10-4 N 3.04 x 10-4 N 0.228 N 0.456 N
Given the property on the left as the criterion, which of the following order of comparison is TRUE? Select one: a. Increasing electrical conductivity at 25 °C: Si < SiO2 < SiCl4 b. Increasing standard boiling point: 0.10 molal solution of sucrose in CH3CH2OH < pure CH3CH2OH < 0.10 molal aqueous solution of sucrose c. Increasing standard melting point: I2 < Br2 < Cl2 d. Increasing melting point: Na < NaCl < Na2O