Q: 10. Fractional Distillation: This lab was viewed via a video and described in detail in lab class.…
A: The purity furnishes information about the presence of a single compound or a mixture of compounds.…
Q: Compounds Mass 3-nitrophthalic acid used 200 mg = 0.2g 8% aqueous hydrazine used 0.4mL…
A: Introduction: The yield which we obtained from performing experiments is called actual yield and the…
Q: A mixture of three compounds, A, B, and C is to be separated and purified by crystallization Their…
A: A question based on analytical separations that is to be accomplished.
Q: particular extraction proceeds with a distribution coefficient of 6. The system consists of 3.5 g of…
A: Fraction extracted and fraction remains in aqueous layer formula is W1= W0 × (V1/KpV2+V1)^n W0=…
Q: The following volume of reagents were used: A = 20.0 ml (Density = 1.04 g/cm3) B = 10.0 ml (Density…
A: For this question, first find mass of A and B using density and volume. Then convert that mass in…
Q: What is each cycle of a simple distillation called? Theoretical plate Distillate…
A: Simple distillation is process of separation.
Q: Consider the following three compounds: a. Which compound do you predict should be the most soluble…
A: We know that like dissolves like means polar solute dissolve in polar solvent whereas nonpolar…
Q: Prepare 250ml of 70% and 90% ethyl alcohol from 95% ethyl alcohol using the formula: C1V1=C2V2.
A: The concentration of a solution can be expressed in various units such as molarity, molality, m/v%,…
Q: Comment on the difference between the enthalpy of combustion values of anthracene, napthalene, and…
A: Enthalpy of combustion of naphthalene (∆H) = -5138.8 20 KJEnthalpy of combustion of Anthracene (∆H)…
Q: Three isomeric compounds with nearly identical boiling points were produced by a CH337 student and…
A: Three compounds are obtained by the chromatogram having peaks of different intensities. All three of…
Q: 2. The SOHIO ammoxidation process of propyte ne to acrytonitrile is given by the reaction: C3 HG (9)…
A:
Q: If your unknow solid has an impurity that is insoluble in cyclohexane, will this impurity result in…
A:
Q: Given : The identity of the unknown compound isolated in fraction 1 was ethyl acetate.The identity…
A: The separation of the mixture of compounds into individual compounds can be accomplished by using…
Q: Bromine in methylene chloride is added in stoichiometric proportions to cyclopentane. What color is…
A:
Q: A 25 g of butyric acid was extracted with 400 mL ether from 400 mL water (Kd=3.0 at 25 °C) Using…
A: Let, Vml of ether solution containing W gm of butyric acid solute be repeatedly extracted with v ml…
Q: You need to purify 0.8 grams of an impure sample of trans-cinnamic acid. After the purification is…
A: In the recrystallisation process of trans cinnamic Acid, A mixed solvent ethanol and water have to…
Q: Andrea and Yvette are going to cook the most delicious food that ever going to exist for their tired…
A: Sugar is sucrose, a molecule consisting of 12 atoms of carbon, 22 atoms of hydrogen, and 11 atoms of…
Q: If my melting point range of my recrystallized materal is from 118-125 degrees Celsius, what does…
A: Since the melting point is in range of 118- 125°C . This range is large. Again we know that pure…
Q: Which of the following mixtures can be efficiently separated by simple distillation? a.) H2ONACI B.)…
A: A multiple choice question about simple distillation method, which is to be accomplished.
Q: Unknown A: Melting point of Unknown A: Gcetomide Candidate compounds from Table 1: 1. M.P. 2. M.P.3-…
A: Melting point is the temperature at which the solid and liquid forms of a pure substance which exist…
Q: Identify whether the statements are TRUE or FALSE
A: 1.True
Q: You and your partner independently measure the melting point of the same pure sample .you observe q…
A: Given: observed melting points Partner A 126.5-129 oC Partner B 126-132 oC How…
Q: 1.0 g of a mixture containing 80% CuSO4.5H2O is taken and heated to 120 oC and 160 oC. According to…
A: Solution == Given that 1.0 g of a mixture containing 80% CuSO4.5H2O a)…
Q: Define gelsication and Write the steps of “drying by sublimation” for heat labile products? and also…
A: Following are the appropriate answers of the given questions.
Q: How would you prepare 15 ounces of 1/3 strength Ensure from full-strength Ensure using water as the…
A: According to question 15 ounces of strength 1/3 So, we need 1 part of Ensure and rest 2 part of…
Q: Laboratory #1 Isolation of Carvone and Limonene from the Oil of Spearmint/Caraway Introduction The…
A: TLC is an analytical technique which can be used to monitor the organic reaction transformations.…
Q: Which technique is more best from flirtation and centrifugation and how?
A: Centrifugation- It is a mechanical process which involves the use of the centrifugal force to…
Q: Compound A is impure and has a melting point of 93°C - 105°C. After purification, A will most likely…
A: Melting point can be defined as the temperature at which a solid melts. When the intermolecular…
Q: 1-A bottle of Na2EDTA.2H2O is labeled with an assay of 100.5%, what is this implied? What is the…
A: Purity of substance- Pure substances are those which are made up of only one type of atoms or…
Q: (b)* The structures for six naturally occurring organic compounds with pleasant smells, B-G, are…
A:
Q: For each reagent calculate the moles with the given information.2-bromoaniline with a molecular…
A: Given, molecular weight of 2-bromoaniline = 172 g/mol , density of 2-bromoaniline = 1.56 g/ml Volume…
Q: 20.00 g of cyclohexanol is massed out and 3.00 ml of concentrated phosphoric acid is added as a…
A:
Q: Consider the volume vs temperature graph below of an unknown 36.00 mL alcoholic moture: Distillation…
A: Volume of alcoholic mixture = 36 mL Volume of distillate collected = 18 mL Remaining volume in the…
Q: kindly help me with this problem thank you ill give like for the answer mixture consists of a…
A: You have to supply distribution coefficient . I am solving that by considering distribution…
Q: Nitroethylene, HyC = CHNO, is a sensitive compound that must be prepared with great care. Attempted…
A: The low recovery of product & a white coating on the inner walls of the distillation apparatus…
Q: Describe the errors which may cause an observed melting point range of a PURE sample to be: higher…
A: Ans 1) If you used very large a sample size and Using uncalibrated thermometer . Packing a…
Q: vapan preu7e of He0= 23. ele Tonole fasactionatoe 23.76- 22 22.98 Malucsetr 190 + 100-to 0-632
A: 0.032 comes from solving ralative lowerring of vapor pressure
Q: https://youtu.be/98G6_W357sl and https://youtu.be/E6i9bisYPCI Pls help determine its Generation,…
A: Here we have to say about qualitative test of above compounds-
Q: lalculate the kf of cyclo hexane using the treezing point of cyclohexane 6502 and benzophe none 4°C…
A: Given that - Freezing point of cyclohexane solvent = 6.50°C Freezing point of Solution = 4°C Mass…
Q: Calculate % purity and % yeild. 15mL Tert-Butyl (density= 0.78g/mL) 37mL HCl (density=1.18g/mL)…
A: The number of moles of a substance can be calculated as the ratio of the mass of that substance to…
Q: ncorrect Separation Scheme NH2 ether, 10 % NaOH aq ether NH 6 M HCI Na,SO4. gravity filtration…
A: Incorrect scheme : sodium hydroxide cannot generate anion on amine because water is more acidic (…
Q: 1 Which of the following procedures would give the result in test tube #2? O Mixing rennin with milk…
A: Test tube 1 shows intact milk. Test tube 2 shows milk all coagulated and denatured.
Q: Concentrated hcl has a specific gravity of 1.185 and is 36.5% (w/w) in HCl. Describe how 1.0 L of…
A:
Q: 1) Suppose a student performs this experiment and obtains a molecular weight of 70g/mol for…
A: Sources of errors to obtain molecular weight of isopropylalchol. The percentage error in measuring…
Q: You are given a pure unknown compound with a melting point of 118 – 120°C, which is either mandelic…
A: A question based on melting point of sample, which is to be accomplished.
Q: 2. Compound A has a molar absorptivity of 1.025 x 103 L cm-1 mol-1 at 280nm and a molar absorptivity…
A: We are given molar absorptivities of compound-A and B at two different wavelengths, 280 nm and 360…
Q: A mixture of ethanol (CH.COH, b.p 78.5 C) and methanol (CH OH. bp 64.5 C) obey Raoult's Law closely…
A: Vapour pressure The pressure exerted by vapour of volatile liquid on the surface is called vapour…
Q: An aqueous of 2.0dm3 contains 53.0g Na2CO3 Calculate in a) gdm-3 b) moldm-3
A:
Q: Temperature (°C) Temperature (°C) Temperature (°C) Temperature (°C) E. Temperature (°C) Temperature…
A: Fractional distillation is defined as the one in which the mixtures having close boiling points to…
Q: ou have bought a new reagent, on the data sheet it says “stable at 4°C for 1 month, for long-term…
A: Given that the reagent is stable at 4 oC only for 1 month. In order to store for more than 1 month,…
Step by step
Solved in 2 steps with 2 images
- 5 g of cobalt carbonate and 13 mL of concentrated hydrochloric acid were used. In another glass, prepare a solution with 8.4 mL of anhydrous ethylenediamine and 2.8 mL of concentrated hydrochloric acid. They are mixed and added and 6.5 mL of peroxide were added to it.30% hydrogen, thenconcentrated hydrochloric acid is added, followed by60 mL of ethanol. 5.1234 g were obtained orange solid [Co (en) 3] Cl3 What is the percentage yield of the reaction. The reactions are shown in the images.The chemical method of analysis in determination of the blood alcohol content (%BAC) is: K2Cr2O7 + H2SO4 + C2H5OH → Cr2(SO4)3 + K2SO4 + CH3COOH + H2O What are the stoichiometric coefficients for the reaction above? (please enter the coefficients without spaces and with a coma between the numbers, e.g. 1,2,3,4) 2,8,3,2,2,3,11 During a Breathalyzer Test it was determined that 1.75mg of K2Cr2O7 was consumed by the above reaction. Calculate the number of milligrams of ethanol in the test sample. 0.411 Calculate the Blood Alcohol Content in this sample (%BAC).3. ¿Cómo se preparan 1.0 L de solución de etanol al 12.0 %v/v? 4. ¿Cómo se preparan 500.0 ml de una solución de C5H1205 0.125M? 5. ¿Cómo se preparan 500.0 g de solución de C5H1205 al 0.100 m?
- A student performs a crystallization on an impure sample of biphenyl. The sample weighs 0.5 g and contains about 5% impurity. Based on his knowledge of solubility, the student decides to use benzene as the solvent. After crystallization, the crystals are dried and the nal weight is found to be 0.02 g. Assume that all steps in the crystallization are performed correctly, there are no spills, and the student lost very little solid on any glassware or in any of the transfers. Why is the recovery so low?1. 250.0 g each of toluene (CoHsCH:) and benzene (CsHs) are mixed together. Answer the following questions. C&H6 C6HSCH3 Compound M (g/mol) Kr (°C/m) | TP (°C) | Kb(C/m) 5.12 7.27 78.108 93.142 5.55 -95.0 2.53 3.29 To (°C) 81.1 110.7 (a) In this solution, which is the solute and which is the solvent? (b) What is the freezing point of this solution, in °C? (c) What is the boiling point of this solution, in °C? (d) Calculate the osmotic pressure of this solution in kPa. Assume that the masses are additive and the density of the final solution at 25°C is 0.867 g/mL.Oral rehydration salts are stated to contain the following components: Sodium Chloride 3.5g Potassium Chloride 1.5g Sodium Citrate 2.9g Anhydrous Glucose 20.0g 8.342 g of oral rehydration salts are dissolved in 500 ml of water. 5 ml of the solution is diluted to 100 ml and then 5 ml is taken from the diluted sample and is diluted to 100 ml. The sodium content of the sample is then determined by flame photometry. The sodium salts used to prepare the mixture were: Trisodium citrate hydrate (C6H5Na3O7, 2H2O) MW 294.1 and sodium chloride (NaCl) NW 58.5. Atomic weight of Na = 23. The content of Na in the diluted sample was determined to be 0.3210 mg/100 ml. Determine the % of stated content of Na in the sample. The stated should be 104.5, how??
- Oral rehydration salts are stated to contain the following components: Sodium Chloride 3.5g Potassium Chloride 1.5g Sodium Citrate 2.9g Anhydrous Glucose 20.0g 8.342 g of oral rehydration salts are dissolved in 500 ml of water. 5 ml of the solution is diluted to 100 ml and then 5 ml is taken from the diluted sample and is diluted to 100 ml. The sodium content of the sample is then determined by flame photometry. The sodium salts used to prepare the mixture were: Trisodium citrate hydrate (C6H5Na3O7, 2H2O) MW 294.1 and sodium chloride (NaCl) NW 58.5. Atomic weight of Na = 23. The content of Na in the diluted sample was determined to be 0.3210 mg/100 ml. Determine the % of stated content of Na in the sample.How much drying agent, MgSO4, would be needed for drying of 20mL dichloromethane solution that contains 0.01% water, knowing that each mole of MgSO, can absorb 7 moles of H;0?Pls provide clear solution on B & C 1. The Freons are a class of compounds containing carbon, chlorine, and fluorine. While they have many valuable uses, they have been shown to be responsible for depletion of the ozone in the upper atmosphere. In 1991, two replacement compounds for Freons went into production: HFC 134a (CH₂FCF 3) and HCFC-124 (CHCIFCF 3). to a. Calculate the molar masses of these two compounds(CH₂FCF3 and CHCIFCF 3). b. What is the percent composition of CH₂FCF 3? c. What is the percentage of Chlorine present in CHCIFCF 3.
- The boiling points for the compounds are 118 °C and 35 °C respectively. The solubility for both compounds is the same (8g/100g water). Explain this observation for (i) boiling point disparity; (ii) solubility similarity H-bonds form in diethyl ether; n-butyl alcohol forms H-bonds in water H-bonds form in n-butyl alcohol; diethyl ether forms H-bonds in water H-bonds in n-butyl alcohol; Both compounds form H-bonds in water O Both compounds form H-bonds; Both compounds form H-bonds in waterWhen a Vitamin C (ascorbic acid; MM = 176.12 g mol-1) tablet is crushed, dissolved and titrated with 0.0340 M KIO3(aq) to a purple/blue endpoint (given by a starch indicator), the volume of KIO3 used is 29.80 mL. If 60 mg of ascorbic acid is the recommended dietary allowance (i.e., 100% of the RDA), then what is the % RDA for the Vitamin C in the tablet? KIO3(aq) + 5 KI + 6 H+ → 3 I2(aq) + 3 H2O I2 (aq) + ascorbic acid → 2 I- + dehydroascorbic acid19. A liquefied mixture of n-butane, n-pentane, and n-hexane has the following composition: n-C,H10 50%, n-C,H12 30%, and n-C,H14 20%. For this mixture, calculate: a) The weight fraction of each component. b) The mole fraction of each component. c) The mole percent of each component. d) The average molecular weight of the mixture.