For each melting point range, calculate the midpoint of the melting temperature range. Report Table MP.3: Melting pont analysis Midpoint of melting temperature (MP) range for pure compounds and mixtures Pure benzoic acid 80:20 mixture (benzoic acid:mandelic acid) 60:40 mixture (benzoic acid:mandelic acid) 40:60 mixture (benzoic acid:mandelic acid) 20:80 mixture (benzoic acid:mandelic acid) Pure mandelic acid (4pts) Start of MP temp range (°C) 121 95 Table view List view End of MP temp range (°C) Midpoint of MP temp range (°C) 123 109 92 99 99 89 88 87 118 122 102 95.5 91 93 00 88.5 90 120 119 Graph your results of the pure compound and mixture melting points. For each point, use the temperature in the middle of your melting point range. After plotting all the points, draw two best fit straight lines to connect at the eutectic composition. Upload your graph or Excel file here.

For each melting point range, calculate the midpoint of the melting temperature range. Report Table MP.3: Melting pont analysis Midpoint of melting temperature (MP) range for pure compounds and mixtures Pure benzoic acid 80:20 mixture (benzoic acid:mandelic acid) 60:40 mixture (benzoic acid:mandelic acid) 40:60 mixture (benzoic acid:mandelic acid) 20:80 mixture (benzoic acid:mandelic acid) Pure mandelic acid (4pts) Start of MP temp range (°C) 121 95 Table view List view End of MP temp range (°C) Midpoint of MP temp range (°C) 123 109 92 99 99 89 88 87 118 122 102 95.5 91 93 00 88.5 90 120 119 Graph your results of the pure compound and mixture melting points. For each point, use the temperature in the middle of your melting point range. After plotting all the points, draw two best fit straight lines to connect at the eutectic composition. Upload your graph or Excel file here.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

When a distilled water is distilled is there any residue at the bottom part of the distillation tube? If there is, identify what substance it is
I need help with this question please! Use dimensional analysis please!?
1) Determine the mass of the condensed portion of the unknown that you placed in the test tube. 2) Use the mass of the water in the test tube and it’s density to calculate the volume of the test tube. 3) Use the calculations from Questions 1 & 2, along with the temperature of the boiling water bath and the barometric pressure of the room, to calculate the molar mass of the unknown compound. 4) identify the unknown liquid substance that you tested. 5) Using the SAMPLE data, calculate the molecular weight of the unknown and determine the identity from the chart.
Please provide a step by step solution on how to compute for the volume of a 30% Brine Solution having a mass of 10 kg.
1. To determine the melting point of aspirin, Gerald placed the sample in a capillary tube tied to a thermometer and heated them in an oil bath. Which constitute the system and the surroundings? a.system: aspirin, thermometer, oil, alcohol lamp; surroundings: Gerald b.system: aspirin; surroundings: thermometer, oil, alcohol lamp c.system: aspirin, thermometer, oil; surroundings: alcohol lamp d. system: aspirin, thermometer; surroundings: oil, alcohol lamp 2. Which of the following processes is exothermic, given the following: N2(g) + 2O2(g) → N2O4(l) ΔHo = 9.67 kJ mol-1N2(g) + 2O2(g) → 2NO2(g) ΔHo = 67.70 kJ mol-1 a.2NO2(g) → N2O4(l) b.2N2(g) + 4O2(g) → 2N2O4(l) c.N2(g) + O2(g) → N2O4(l) +NO2(g) d.(1/2)N2(g) + O2(g) → NO2(g)
When dissolving 100g of sugar in water, which of the following would increase the speed at which dissolving occurs? [Check any that will increase the rate of solution formation.] Stir the mixture. O Heat the mixture. O Use extra water. O Use smaller sugar cubes. O Increase the pressure.
Making Rock Candy Boil 0.25 L of water. Caution: Be sure to follow all safety precautions when boiling water. Add sugar to the water until no more sugar will dissolve. Pour the sugar solution into a glass. Tie washer to one end of string. Tie the other end of the string to a pencil. Place the pencil across the top of the glass so that the string and washer hang down into the sugar solution. Do not let the washer touch the bottom of the glass. Allow the solution to cool. After several days, observe the string. What formed on the string? Explain your observation in terms of saturation.
The following question concerns the T-x-y diagram of methanol and water shown below. 105 100 Temperature (°C) 95 90 85 80 75 70 65 60 0 0.1 0.2 0.3 0.4 0.5 0.6 Mole fraction of methanol 0.7 0.8 0.9 1
Compare the percentages of water for each trial? Are they close to one another? Why/why not? trial 1 = 28.6%trial 2 = 29.8%trial 3 = 24.8%trial 4 = 28.8%
You need a 25% alcohol solution. On hand, you have a 650mL of a 20% alcohol mixture. You also have 75% alcohol mixture. How much of the 75% mixture will you need to add to obtain the desired solution?
Number 2 (PRE) Please answer A and C thank you
What is the final equilibrium temperature after you mix 10 grams of ice at 0 degrees C with 50 grams of water at 90 degrees C? I have posted my proffesor's solution I understand it for the most part but I'm confused on why in her solution she does the mass of ice times the specific heat of WATER times change in temp. Why does she use the specific heat of water and not ice?? I understand the rest of the problem but that is tripping me up