Recrystallization Post-Assignment

The alcohol content of hard liquor is normally given in terms of the “proof,” which is defined as twice the percentage by volume of ethanol (C2H5OH) present. Calculate the number of grams of alcohol present in 1.00 L of 75-proof gin. The density of ethanol is 0.798 g/mL. Round off to 4 sig. figures for all calculations made prior to final answer and the final answer should be in 3 sig. figures

4. Why is fractional distillation more "efficient" than simple distillation? During boiling point determination the temperature of the vapors is be E

Why is fractional distillation more efficient than simple distillation when purifying liquid mixtures?

A certain liquid X has a normal boiling point of 93.90 °℃ and a boiling point elevation constant K₁ = 1.14 °C-kg-mol¯¹. Calculate the boiling point of a solution made of 40.1g of zinc chloride (ZnCl₂) dissolved in 350. g of X. Round you answer to 4 significant digits. °C x10 X 1 Ś

A student wants to determine how different factors affect the rate of dissolving a solid in water. Trial Size of Particles Rate of Dissolving 1 small 10 sec medium 20 sec 3 large 30 sec What procedures can be performed on trials 2 and 3 so that the rate of dissolving is the same as trail 1? The student can decrease the temperature The student can decrease the pressure The student can increase the pressure The student can increase the temperature

5. Why does slow distillation result in better separation of two liquids than fast distillation?

NO₂ 4 5 NH₂ NH HNO3 Isopropanol, NaOH reflux, 12 h 6 NO₂

Only typed solution.

Submit Previous Answers A solid mixture consists of 25.5 g of KNO (potassium nitrate) and 4.5 g of K2SO4 (potassium sulfate). The mixture is added to 130. g of water v Correct Use this solubility curve (Eigure 1) to answer the questions. Crystallization Crystallization is the opposite of dissolution. Since solids tend to dissolve better at higher temperatures, we can cause them to crystallize (i.e., undissolve) from a solution by lowering the temperature. Part B If the solution described in the introduction is cooled to 0 °C, what mass of KNO, should crystallize? Enter your answer numerically in grams. • View Available Hint(s) Figure < 1 of 1 29.65 KNO, / NH,CI Previous Answers Submit 50- Nac X Incorrect; Try Again; 6 attempts remaining 40 30 LiSO, Part C Complete previous part(s) 20 - K,SO, 10- Part D KCIO, 10 20 30 40 50 60 For which salt, K2SO,, LişSO,. KCIO,, or NH,C1, will increasing the temperature of the water have the greatest change in solubility per 100 g solvent?…

A 1.232-gram sample of copper complex weighed 0.783 g after heating. What is the percent of volatile material in this sample? If the sample contains 17.4% ammonia, what is the percent water in the sample?

The freezing point of water is 0.00°C at 1 atmosphere. A student dissolves 13.21 grams of sodium chloride, NaCl (58.40 g/mol), in 282.7 grams of water. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kb (°C/m) Kf (°C/m) Water H2O 0.512 1.86 Ethanol CH;CH2OH 1.22 1.99 Chloroform CHC13 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH,OCH,CH3 2.02 The molality of the solution is m. The freezing point of the solution is °C.

ed The boiling point of water is 100.00 °C at 1 atmosphere. A student dissolves 12.63 grams of sodium sulfide, Na₂S (78.05 g/mol), in 163.3 grams of water. Use the table of boiling and freezing point constants to answer the questions below. Solvent Water Ethanol Chloroform Benzene Formula H₂O CH3CH₂OH CHCI 3 соно Diethyl ether CH3CH₂CH₂CH3 The molality of the solution is The boiling point of the solution is Kb (°C/m) Kf (°C/m) 0.512 1.86 1.22 1.99 3.67 2.53 2.02 m. °C. 5.12

What is the classification of each substance

When 184. mg of a certain molecular compound X are dissolved in 85. g of formamide (NH,COH ), the freezing point of the solution is measured to be 1.7 °C. Calculate the molar mass of X. If you need any additional information on formamide, use only what you find in the ALEKS Data resource. Also, be sure your answer has a unit symbol, and is rounded to the correct number of significant digits. Ox10 미

A certain liquid X has a normal freezing point of -2.10 °C and a freezing point depression constant -1 K₁=3.79 °C kg-mol . A solution is prepared by dissolving some zinc chloride (ZnCl₂) in 450. g of X. This solution freezes at -5.3 °C. Calculate the mass of ZnCl₂ that was dissolved. Round your answer to 2 significant digits. g x10 X Ś

A certain liquid X has a normal boiling point of 105.30 °C and a boiling point elevation constant K₁ = 1.74 °C-kg-mol¯¹. Calculate the boiling point of a solution made of 8.59g of ammonium chloride (NHCl) dissolved in 150. g of X. Round you answer to 5 significant digits. пос x10 X

A certain liquid X has a normal freezing point of -1.20 °C and a freezing point depression constant -1 K₁=5.73 °C kg-mol . A solution is prepared by dissolving some ammonium sulfate ((NH4), SO4) in 750. g of X. This solution freezes at -6.4 °C. Calculate the mass of (NH4) SO4 that was dissolved. Round your answer to 2 significant digits. g x10 X Ś

Using recrystallization techniques, a student attempts to purify 0.50 g of compound H. Based on the solubility of H in the chosen solvent at collection temperature, the maximum percent recovery is 82%. The student obtains 0.396 g of purified crystals. What is their percent recovery? Group of answer choices 41% 64% 79% 82% 97% none of these

An unknown salt is known to be composed of Rubidium and a halogen. 4 grams of the salt dissolved in 100 grams of water freezes at a temperature of-1.4C. What is the formula of the unknown salt? Upload your work to this problem along with the other two free response questions into moodle. Please make sure this questions is labeled as Free Response-3 O RbF Rbl O RbBr O RbCl

A 5.04 g sample of a solid containing Ni is dissolved in 20.0 mL water. A 5.00 mL aliquot of this solution is diluted to 100.0 mL and analyzed in the lab. The analyzed solution was determined to contain 5.53 ppm Ni. Determine the molar concentration of Ni in the 20.0 mL solution. concentration: M Determine the mass, in grams, of Ni in the original sample. mass: g Determine the weight percent of Ni in the sample. weight percent: % * TOOLS x10

What are the difference between Simple distillation and Fractional distillation ?

Part C: Determination of the alcohol content of unknown liquor St tiend Volume (mL) Sample ТИШТИНА 0.00% alcohol 10.0% alcohol 20.0% alcohol 40.0% alcohol 50.0% alcohol Unknown Mass (g) 1o podina ko 9.8919 9.7899 9.600 9 9.420 д % Alcohol content of the liquor_ 9.2155 9.5089 2VLELA CVOLION EAEK EVI OK DRA IVBOKY LOBAN ocen 10.00 10.00 10.00 10.00 10.00 10.00 Density (g/mL) 0.00% alcohol calculation: ися → о 0.99 во 0.99 Ino7 sm dolaW 120.00 supinubst sdi na LANG 411 be: [scordas: 0.97 0.94 in oil to notisalarisi 0.92 0.95

A mixture of 20 mL of isoamyl acetate (MW=130.2 g/mol and density= 0.88 g/mL) and 20 mL of methyl benzoate (MW= 136.2 g/mol and density =1.09 g/mL) is distilled. Calculate the mole percent for each component. Use these mole percents and the figure below to answer the following questions.a. What is the initial boiling point of this mixture?b. What is the composition of the vapor in equilibrium with the liquid? Is this composition the same as the composition of the initial condensate from simple distillation?c. Instead of a simple distillation, you decide to use fractional distillation. Assuming two theoretical plates, what is the composition of the first fraction collected?

The question is: Benzyl alcohol (bp 205 degrees C) was selected by a student to crystallize fluorenol (mp 153-154 degrees C) because the solubility characteristics of this solvent are appropriate. However, this solvent is not a good choice. Explain.   I want to say it’s because the boiling point is too high but I can’t think about how to expand that answer or even if it’s correct.    Thanks for the help!