1. What are some common uses for simple distillation? What are some common uses for fractional distillation? 2. If you want to separate acetone (BP 58 °C) and water (BP 100 "C), would simple or fractional distillation be more appropriate? Why?

1. What are some common uses for simple distillation? What are some common uses for fractional distillation? 2. If you want to separate acetone (BP 58 °C) and water (BP 100 "C), would simple or fractional distillation be more appropriate? Why?

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...

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Question 2: You are provided a 1 gram mixture of equal parts of benzoic acid and naphthalene and given the task of separating these two molecules from each other. In the table below there is some relevant information provided. OH Benzoic Acid Melting Point 122.3 °C Solubility in ethyl acetate 0.55 g/mL Solubility in water 0.029 g/mL Molecular weight = 122.1 g/mol Napthalene Melting Point 80 °C Solubility in ethyl acetate 0.5 g/mL Solubility in water 0.031 mg/mL Molecular weight = 128.1 g/mol In the space below please describe the experimental procedure that you would use to separate this mixture into pure naphthalene and pure benzoic acid. The use of numbered or bulleted lists would be greatly appreciated.
A 1 mL sample of glycogen was calculated to contain 21 µmol (micromole) glucose. To 1 mL of this sample was added 2 mL of 2 M HCl. It was then hydrolysed by boiling the solution for 15 minutes. After boiling the hydrolysate was cooled and made up with H2O to a final volume of exactly 10 mL. The glucose was measured in this solution and found to have a concentration of 340 µg/mL (microgram/milliliter). i) Calculate the mass (mg) of glucose in the 10 mL of hydrolysate. As the 1 mL of glycogen sample was made up to a final volume of 10 mL, this mass of glucose was produced by the hydrolysis of the original 1 mL glycogen sample. ii) Calculate the amount (µmol) of glucose produced by the hydrolysis of the glycogen sample. iii) Calculate the purity of the glycogen used in the sample as % Purity = (moles of measured glucose/ moles of calculated glucose in glycogen) *100 iv) state your answer in a complete sentence. Show your working out such that the marker can easily understand it.…
2. Example of water of crystallization is CuSO4 CuSO4.5H20 NaHCO3 NaCO3
A 1 mL sample of glycogen was calculated to contain 35 µmol (micromole) glucose. To 1 mL of this sample was added 2 mL of 2 M HCL. It was then hydrolysed by boiling the solution for 15 minutes. After boiling the hydrolysate was cooled and made up with H2O to a final volume of exactly 10 mL. The glucose was measured in this solution and found to have a concentration of 570 µg/mL (microgram/milliliter). i) Calculate the mass (mg) of glucose in the 10 mL of hydrolysate. As the 1mL of glycogen sample was made up to a final volume of 10 mL, this mass of glucose was produced by the hydrolysis of the original 1 mL glycogen sample. ii) Calculate the amount (µmol) of glucose produced by the hydrolysis of the glycogen sample. iii) Calculate the purity of the glycogen used in the sample as % Purity = (moles of measured glucose/ moles of calculated glucose in glycogen) *100 iv) state your answer in a complete sentence.
Room temperature: 295.9 K Barometric pressure: 769.0 mmHg Vapor of water: 21.1 mmHg Volume of O2 collected: 59.20 mL Density of H2O2: 1.01 g/mL % Composition H2O2: 3.02 % Volume of H2O2 used: 5.00 mL Letter of the unknown solution of H2O2: C Volume of O2 collected for the unknown: 64.90 mL Calculate R in the ideal gas law.
Describe the preparation of a 700 mL of 4.36% (w/v) aqueous ethanol (C2H; OH, 46.1 g/mol). Weigh ___ g ethanol and add enough water to give a final volume of ____ mL. 700 g of 4.36% (w/w) aqueous ethanol. Mix ____ g ethanol with ____ g water. 700 mL of 4.36% (v/v) aqueous ethanol. Dilute ____ mL ethanol with enough water to give a final volume of ____ mL.
A student dissolved 5.00 grams of ammonium chloride in 95 mL of water. The water temperature went from 20.00 C to 13.00 C. Determine the heat produced by the dissolution of NH4Cl in water. Assume the density of water is 1.000 grams/ mL and the specific heat of the solution is 4.184 J/g C
Yuno wants to assess the quality of water in the Clover Kingdom and the Heart Kingdom. In order to do this, he took a 200.0 ml sample (T= 20oC) from the two areas and titrated them with sodium thiosulfate. The water from the Clover Kingdom used up 7.15 ml of the titrant while 7.65 ml where used on the Heart Kingdom’s water. Prior to this, 0.1000g of potassium iodate (FM: 214.01 g/mol; 99.97% purity) was weighed and subsequently dissolved in 150.0 ml of distilled water. He took 20.00 ml aliquot of this solution and added 20.00 ml of distilled water. He then treated the solution with potassium iodide and sulfuric acid. Finally, Yuno titrated the solution with 13.7 ml sodium thiosulfate titrant. Calculate the DO content of the two samples. Express your answer in ppm O2. Reminder: Follow proper significant figure rules Clover Kingdom: ____ ppm O2 Heart Kingdom: ____ ppm O2
An unknown hydrated compound (AC·XH2O) contains 35.9% H2O. The molar mass of the anhydrous compound (AC) is 159.61 g/mol. Find the water of crystallization in this unknown hydrate. Part A is to find the number of moles of water. Remember the molar mass of water is 18.02 g/mol.
Suppose that you have a 1:1 mixture of compounds that is comprised of compound X and compound Y. You desire pure compound X and are planning a recrystallization to enhance the purity. Which solvent below is optimal for your recrystallization? Ethanol (boiling point = 78 °C) Solubility At 0 °C 100 °C Compound X 0.05 g/mL 0.20 g/mL Compound Y 0.02 g/mL 0.40 g/mL Water (boiling point = 100 °C) Solubility At 0 °C 100 °C Compound X 0.02 g/mL 0.05 g/mL Compound Y 0.01 g/mL 0.10 g/mL Methanol (boiling point = 65 °C) Solubility At 0 °C 65 °C Compound X 0.04 g/mL 0.10 g/mL Compound Y 0.02 g/mL 0.30 g/mL Acetone (boiling point = 56 °C) Solubility At 0 °C 56 °C Compound X 0.10 g/mL 0.50 g/mL Compound Y 0.20 g/mL 0.50 g/mL Ethyl Acetate (boiling point = 77 °C) Solubility At 0 °C 77 °C Compound X 0.10 g/mL 0.60 g/mL Compound Y 0.30 g/mL 0.60…
Please answer parts a and b
Grams of solute per 100 g H₂O 140 130 120 110 100 90 80 70 60 50 40 30 20 10 NH37 NaNO3 KCIO3. KNO3 NHẠC KCI Naci -Ce₂(SO4)3 0 10 20 30 40 50 60 70 80 90 100 6. How many grams of KCI can be dissolved in 100g of water at 80°C? 7. At 40°C, how much KNO3 can be dissolved in 100g of water? 8. At 30°C, 90g of NaNO3 is dissolved in 100g of water. Is this solution saturated or unsaturated? 9. How could you tell by looking at a solution that was saturated? 10. A vinegar brand contains 4% acetic acid by volume. If the density of vinegar is 1.05 g/ml, how many grams of acetic acid are in a 250.0 mL of vinegar? 19