Lab Report-2-Matter and Phase Changes Distil Ethanol

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

5. Chemical Xis a solid with white color that forms large crystals. The solubility of chemical X in water at different temperatures is shown below. Solubility of X in H20 124 10- 8- 6- 2- 0+ Ó 10 20 30 40 50 60 70 80 90100 Temperature (°C) Irina wants to dissolve 30 grams of Xin 1 liter of water. She does so by stirring 30 grams of the large crystals into 1 liter of water at 45°C. How could Irina change her method to dissolve all the X faster? Solubility (g/100 g H,O) 4-

Balance

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

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)

The boiling point of water is 100.00 °C at 1 atmosphere. A student dissolves 14.52 grams of calcium acetate, Ca(CH3COO)2 (158.2 g/mol), in 156.5 grams of water. Use the table of boiling and freezing point constants to answer the questions below. Solvent Formula Kh (°C/m) Kf (°C/m) Water H20 0.512 1.86 Ethanol CH3CH2OH 1.22 1.99 Chloroform CHCI3 3.67 Benzene C6H6 2.53 5.12 Diethyl ether CH3CH2OCH2CH3 2.02 The molality of the solution is m. The boiling point of the solution is °C.

Only typed solution.

Part B The solvent for an organic reaction is prepared by mixing 70.0 mL of acetone (C3H6O) with 64.0 mL of ethyl acetate (C4H8O2). This mixture is stored at 25.0 °C. The vapor pressure and the densities for the two pure components at 25.0 °C are given in the following table. What is the vapor pressure of the stored mixture? Vapor pressure Density Compound (mmHg) (g/mL) 230.0 0.791 95.38 0.900 acetone ethyl acetate Express your answer to three significant figures and include the appropriate units. ▸ View Available Hint(s) Psoln: HÅ Units Value ?

Part E Write balanced complete ionic equation for NaOH(aq)+ HC,H,O2 (aq)→H,O(1) + NaC, H,O2 (aq). Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣΦ x" O That's not quite right. Please check your formatting and try again No credit lost. Try again. Submit Previous Answers Request Answer Part F Write balanced net ionic equation for NAOH(aq) | HC,H,O, (aq) H,O(1) i NaC, H,O, (aq). Express your answer as a chemical equation. Identify all of the phases in your answer.

Part A H2 SO4 (aq) and LİOH(ag) Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣφ ? Submit Request Answer Part B HCl(aq) and Al(OH)3 (s) Express your answer as a chemical equation. Identify all of the phases in your answer. ΑΣφ ? Submit Request Answer Part C H2 SO3 (ag) and Mg(OH)2(s) Express your answer as a chemical equation. Identify all of the phases in your answer.

The 50:50 (by mass) mix of water and ethylene glycol (antifreeze) contains 16 moles of ethylene glycol per 1 kg of water. Given than K₁ for water is 0.5 °C/m, what is the boiling point of the mixture? 100.5°C 108 °C 92°C 100°C 99.5°C

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…

When 50 g phenol is mixed with 50 g water at 20 ° C, two phases are formed. One of the phases contains 8% phenol by mass and the other contains 72% phenol. Find the mass of each phase and the masses of the components in these phases.

Solvent Formula Diethyl ether Water Ethanol Chloroform CHCl3 Benzene C6H6 H₂O CH3 CH₂ OH Kb (°C/m) K(°C/m) 0.512 The molality of the solution is The freezing point of the solution is 1.22 3.67 2.53 CH3 CH₂ OCH₂ CH3 2.02 m. 1.86 1.99 5.12 °C.

1. Consider the temperature-composition diagram shown below for benzene (bp = 80°C) and toluene (bp = 110°C). For a 80/20 mixture of toluene to benzene answer the following: Temperature (°C) 110 8 95 90 3 80 1 T 1 1 0.2 0.4 0.6 Mole Fraction of Toluene a) At what temperature will the mixture begin to boil (use just approximate values)? b) When the mixture begins to boil, what is the mol % benzene in the vapor? c) What is the boiling point of the liquid formed by condensation of the vapor? 1 0.8 110 100 95 90 85 80

Petroleum chemistry

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

Acrylonitrile and ethyl acetate have the same boiling point: 77.20C. Which statement explains the outcome you would expect if a mixture of these two substances were distilled? * The acrylonitrile would vaporize first and the ethyl acetate would be left behinc O The ethyl acetate would vaporize first and the acrylonitrile would be left behind Both substances would vaporize at the same time so distillation would not be h Ethyl acetate is a solid so distillation would involve allowing the acrylonitrile to evaporate. Which statement best explains why structural formulas are good for depicting polymers?

1. What is the mass of water in a 150 mL 70% ethyl alcohol? Consider the density of water at 25 °C. a.) What percent by volume of water?

1. ASSERTION: The solubility of gases in water follows the order O2 < N2 < SO2 < CO2 < NH3. REASON: For appreciable solubility, the solute-solvent interactions should outweigh the solute-solute and     solvent-solvent interactions. a. Assertion and reason both are correct statements and reason is the correct explanation for assertion. b. Assertion and reason both are correct statements but reason is not the correct explanation for assertion. c. Assertion is a correct statement but reason is a wrong statement. d. Assertion is a wrong statement but reason is a correct statement. 2. ASSERTION: The solubility of all gases in water decreases with the rise in temperature. REASON: The dissolution of gases in water is an endothermic process. a. Assertion and reason both are correct statements and reason is the correct explanation for assertion. b. Assertion and reason both are correct statements but reason is not the correct explanation for assertion. c. Assertion is a correct…

physical chemistry: With the given diagram below, How many phases does a mixture of these liquids have? Liquid Amount (mol) xT xW xE A 15 0.5 0.25 0.25 B 20 0.33 0.33 0.33 C 7.5 0.1 0.8 0.1 For the mixture in the problem above, what are the composition of the phases? If there are two phases, what are the compositions of the trichloromethane-rich and water-rich phases?

What would be a Prerequisite Skill or Prior Knowledge that a 5th grade science class should know about Volcano Eruptions before using the below standard? Standard Conduct an investigation to determine whether the mixing of two or more  substances results in new substances.

(aq) # Al(s) -+ Mn?+ (ag) + Af# (ag) Express your answer as a chemical equation. Identify all of the phases in your answer.

200 mL Ethanol (d= 0.789 g/ml) was used to dissolve a certain 1.000 g  of organic compound. The boiling tempertaure of the mixture is 78.47 oC. If the initial boiling point of ethanol is 78.4 oC (Kb= 1.20 oC/m), What organic compound was dissolved in ethanol?     Catechol ( C6H6O2)     Naphthalene ( C10H8)     Glucose (C6H12O6)     Calcium chloride (CaCl2)

Subject- chemistry

Potassium nitrate is extremely soluble in water.  The solubility of potassium nitrate is 60 g KNO3 per 100 g of water at 42oC.  1.  If 35 g of KNO3 is dissolved in 100 g of water at the same temperature, would the solution be saturated or unsaturated?  Explain your answer.   2.  If 15 g of KNO3 is dissolved in 50 g of water at the same temperature, would the solution be saturated or unsaturated?  Explain your answer.  Can any additional KNO3 be dissolved in the given amount of water assuming the temperature does not change?  If so, calculate the amount of additional potassium nitrate that can be dissolved.

Predict the temperature at which CuSO4:5H2O undergoes dehydration. CuSO4:5H20 (s) CUSO4 (s) + 5H2O (g) AfHo -2280 -771 -242 kJ mol-1 Smo 300 109 189 J K-1 mol-1 T>= K. 3 sig. fig.