1. What is the most appropriate way to dispense 1.38 g of solid sodium chloride? With a graduated cylinder With a graduated pipette With a spatula With a pasteur pipet 2. Steam distillation is typically used for Isolation of organic compounds with low boiling points Isolation of organic compounds with high boiling points Removing water from an organic solution Purification of inorganic mixtures O O O O

1. What is the most appropriate way to dispense 1.38 g of solid sodium chloride? With a graduated cylinder With a graduated pipette With a spatula With a pasteur pipet 2. Steam distillation is typically used for Isolation of organic compounds with low boiling points Isolation of organic compounds with high boiling points Removing water from an organic solution Purification of inorganic mixtures O O O O

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter9: Liquids, Solids, And Materials

Section: Chapter Questions

Problem 104QRT: Consider this information regarding two compounds. Thallium azide: yellow crystalline solid; melting...

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Consider this information regarding two compounds. Thallium azide: yellow crystalline solid; melting point = 330 C; slightly soluble in water, more soluble in hot water; insoluble in ethanol or diethyl ether. Camphene: colorless, cubic crystals; melting point = 51 C; boiling point = 159 C; insoluble in water; moderately soluble in ethanol; soluble in diethyl ether. (a) Is camphene an ionic or molecular compound? Explain your answer. (b) Is thallium azide an ionic or molecular compound? Explain your answer.
Patients undergoing an upper gastrointestinal tract laboratory test are typically given an X-ray contrast agent that aids with the radiologic imaging of the anatomy. One such contrast agent is sodium diatrizoate, a nonvolatile water-soluble compound. A 0.378-m solution is prepared by dissolving 38.4 g sodium diatrizoate (NaDTZ) in.l.60 102 mL water at 3 1.2C (the density of water at 31.2C is 0.995 g/cm3). What is the molar mass of sodium diatrizoate? What is the vapor pressure of this solution if the vapor pressure of pure water at 31.2C is 34.1 torr?
beer. A 2.39- mg sample of safrole was dissolved in 103.0 mg of diphenyl ether. The solution had a melting point of 25.70°C. Calculate the molecular weight of safrole. The freezing point of pure diphenyl ether is 26.84°C, and the freezing- point- depression constant, Kf, is 8.00°C/m.
What are the differences between a simple distillation and steam distillation?
Typing speed OFF Simple Distillation Cold water out Simple distillation separates 2 with different boiling points. Solution Distillate Cold water in Bunsen bumer OMB SAMSUNG
Which of the following is NOT a distillation technique? . Simple distillation Density distillation Vacuum distillation Fractional distillation
1-Pentanol to 1-bromopentane Chemicals: - 60ml Conc. Sulfuric Acid - 100ml Saturated Sodium bicarbonate - 65ml 1-Pentanol - 78g sodium bromide - Distilled water - 58.42g 1-Bromopentane 1-Pentanol Sodium Bromide Sulfuric Acid 1-Bromopentane Formula C5H12O NaBr H2SO4 C5H11Br MW (g/mol) 88.15 102.894 98.078 151.04 Density (g/mL) 0.811 3.21 1.84 1.218 Boiling point (*C) 138 1,396 337 130 NaBr(aq) + H2SO4(aq) -> NaHSO4(aq) + HBr(aq) CH3(CH2)4OH(aq) + H+ Br- (aq) CH3(CH2)4OH2 (aq) + Br-(aq) CH3(CH2)4OH2 (aq) + Br-(aq)  CH3(CH2)4Br(aq) + H2O(aq) How do I calculate the percent yield and identify the limiting reagent?
20. What is the best method used to separate the components of the mixture of benzene, toluene, and water? * Simple Distillation Steam Distillation O Fractional Distillation
1-propanol, 2-propanol, and 1-butanol all have boiling too close together to be separated using the simple distillation column. What equipment be used to separate a mixture of these three?
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…
O Simple distillation Density distillation O Vacuum distillation O Fractional distillation
Simple Distillation The temperature was 76o C when the first drop of distillate was collected. Liquid was collected and the temperature gradually rose to 124 o C. Fraction 2 was taken when liquid was distilling at 124o C. Fractional Distillation The temperature was 77o C when the first drop of distillate was collected. Liquid was collected until the temperature reached 78 o C, then the temperature dropped. The temperature of the hot plate was increased and a second fraction of liquid was collected at 126 o C. a.) Based on the boiling points observed when the fractions were collected, what is the identity of the unknown compound isolated in fraction 1 and Fraction 2?