A mixture of three compounds, A, B, and C is to be separated and purified by crystallization Their solubilities in g/100mL ethanol are given below: Solvent A Cold 1.05 5.60 4.20 Hot 20.5 2.3 3.50 a. If a mixture containing 4.0 g of each A, B and C is recrystallized from 100 mL ethanol, which compound would be obtained pure? b. If the filtrate from (a) is evaporated to 50 mL, which of the compound(s) will separate upon cooling? What is its purity?
Q: A. Give the IUPAC name of the following hydrocarbons: 1 CH3 CH2 CH3 ÇH3 H3C -CH2-C- CH CH3 ČH3 ČH3 2...
A:
Q: Refer to the group of elements for the following questions. Arrange the following according to the p...
A: Answer Electron affinity :- the amount of energy liberated when a...
Q: True or False (2) In thermochemical equations, it only shows the direction of the reaction involved....
A: 1.Thermochemical reaction can give us the change in enthalpy when reaction is proceeded from reactan...
Q: Use the available spectra to deduce the identity of an unknown compound. Relative integrations are i...
A: NMR spectroscopy is a very important tool for the determination of the structure of the organic comp...
Q: For a theoretical yield of 21 g and actual yield of 11 g, calculate the percent yield for a chemical...
A: This formula is used to calculate, %yield = (actual yield/ theoretical yield)×100... Given, theoreti...
Q: What is the minimum distribution ratio (Dc) if 98% of the solute in a 25.0-mL sample in an aqueous s...
A:
Q: What is the type of catalysis is in the given reaction: CH3 – CH = CH2(g) + H2(g) Ni (s) CH3CH2CH3(...
A:
Q: 1. The rank as one of the most useful classes of organic compounds because they often serve as start...
A:
Q: What type of reaction has occurred? How do you know? CH3 CH2 =C
A: We have to use some reagent for this reaction.
Q: Name all the functional groups of highly branched isoprenoids. Point out chiral centers and/or cis/t...
A: Highly Branched isoprenoids are a type of lipid produced by marine diatoms. Basically, it consist of...
Q: Y 10 11 12 13 14 Tim e (min) O A. 1234 O B. 2116 O C. 1102 O D. 1936 O E. 1488 Instrument response i...
A:
Q: The following chromatogram is obtained for a mixture of substances X and Y. The retention factor for...
A: Retention factor: The ratio of distance traveled by the substance to the solvent is known as the ret...
Q: answers with the correct number of significant figures. Use additional paper if needed. mumenTcal Ex...
A: The solution is as follows:
Q: A candle flame produces easily seen specks of soot near the edges of the flame, especially when the ...
A: Empirical formula: The simplest positive integer ratio of atoms present in a compound is known as th...
Q: Liquid column chromatography on alumina would separate p-nitrotoluene and p-nitroaniline O A. with p...
A:
Q: The element hydrogen, using the Rhydberg equation, can be used to calculate the energy difference b...
A: The calculated frequency and wavelength are
Q: 63. This picture is an exampile of beverages. alcoholic O fruity citrus
A: In this picture wevsee that this a juice of fruit
Q: What is the molecular weight of gas X if it effuses 1.25 times as rapidly as N2? (5 points) 4.
A:
Q: Brønsted-Lowry concept Brønsted-Lowry acids are substances that can donate a proton (H+) to another ...
A: Given,
Q: Give the structure corresponding to each name. EAMODC 1,1,3-tribromocyclohexane a. 3-chloro-2-methyl...
A: Given :- IUPAC name / common name of compounds 3-chloro-2-methylhexane 4-ethyl-5-iodo-2,2-dimeth...
Q: How would you synthesize the following compounds from butanenitrile using reagents from the table? ...
A: a. Nitrile is converted into carboxylic acid in base hydrolysis followed by acid workup, then ac...
Q: 4. A photon with an energy of 13.323 ev hits a hydrogen atom in the ground state. What level will th...
A:
Q: write the formula of each chemical, then draw lewis structure and structural diagram with approxima...
A: This question is related to valence bond theory. Lewis structure can be defined as representation of...
Q: What is the bond order of the carbon-nitrogen bond in the N-methylidenehydroxylamine molecule?
A: Bond order Means number of Bonds present between the Atoms of molecules.
Q: 32. are used as stoichiometric reagents in both industrial ar research-oriented chemical reactions. ...
A:
Q: B. Ex: Sulfur and copper, when heated together, react to form copper(I) sulfide, Cu2S. How many gram...
A: The given chemical reaction is as follows: S8(s) + 16Cu(s) → 8Cu2S(s) The mass of sulfur given = 10....
Q: The CH3COOH could have greater vapor pressure lowering than NaOH. O True O False
A: Answer Lowering in vapour pressure is a colligative property Which is...
Q: 4. - Cl2 + CH3 + Br2 5.
A:
Q: 6. What is the 1H NMR splitting pattern of the highlight marked Hydrogen? A. Singlet B. Doublet C. Q...
A: The correct answer about NMR spectroscopy is given below
Q: What is the freezing point (°C) of a solution prepared by dissolving 50.0 g of glycerin in 200.0 g o...
A: Given data is as follows: The mass of glycerin = 50.0 g The mass of ethanol = 200.0 g The freezing p...
Q: 54. is used in embalming, tanning. preparing glues, and polymeric products, as germicides, insectici...
A: Carbonyl compounds: These are two types 1. Aldehydes 2. Ketone Aldehyde and ketones both conta...
Q: A. Write the balanced chemical equation for each of the reactions. Example: The combustion of propan...
A:
Q: Consider the octahedral species CrCl63- (point group Oh). What point group results by removing on...
A: Given
Q: Which of the following is the correct order of the following substances in increasing intermolecular...
A: The correct order for increasing intermolecular forces of attraction is given below.
Q: A cylindrical metal canister is filled with pressurized diatomic oxygen gas, O2. e circular base of ...
A: Radius of circular base of cylinder = r = 0.06m Height of cylinder = h = 0.3m Pressure of gas = 5.78...
Q: Emma lives in Wisconsin and wants to plant geraniums in her yard. The average daily temperature in h...
A: Emma lives in Wisconsin and wants to plant geraniums in her yard. The average daily temperature in h...
Q: Consider an ideal gas with an absolute temperature of T1. To what temperature would the gas need to ...
A:
Q: Given the values of bond length, arranged in DECREASING order of intramolecular force:(1) C=O 133;(2...
A:
Q: 2. A 1000 cc flask is filled with 4.00 grams of hydrogen gas and 8.27 ounces of bromine gas at 44...
A:
Q: The following chromatogram is obtained for a mixture of substances X and Y. Calculate the separation...
A:
Q: The picture beklow is a fruity flavor of ether ester amine
A:
Q: What is the type of catalysis is in the given reaction: CH3 – CH = CH2(g) + H2(g) Ni (s) Ns CH3CH2CH...
A: This is a reaction where the alkene is converted into alkane . Here Ni(s) as a catalyst.
Q: This is about Quantum Numbers, Electronic Configuration, and Periodic Trends. Following are descri...
A: ANS. Sr (strontium)
Q: Suppose we have a 12.2 L sample containing 0.50 mol oxygen gas (O2) at a pressure of 1 atm and a tem...
A:
Q: 3. Identifying Types of Reactions: For each of the following reactions, identify the category of rea...
A: Given:- There are different types of reactions are given and we have to identify what type of reacti...
Q: H3C CH2 + H20 4. Type Reaction: OH [0] 5. НаС Type of Reaction: CH3 CH3 CH3 HO 6. OH Type of Reactio...
A: Organic reactions are chemical reactions involving organic compounds. The basic organic chemistry re...
Q: 20. Using the data provided, solve for the enthalpy change value of the target equation. Note: Inclu...
A:
Q: For the nitrogen fixation reaction 3H2(g) + N2(g) 2NH3(g), Kc = 6.0 × 10–2 at 500°C. If 0.250 M H2 ...
A:
Q: 11. Which of the following statements are true regarding an acid-base indicator? (Select all that a...
A: a. its colour changes at the equivalence point of any acid-base titration
Q: 10a.Bulletproof vests are made of the polymer called Kevlar. It is produced by the polymerization of...
A:
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- (1a) Pure benzophenane freezes at 66.6 °C. A solution of 7.75 g of biphenyl (C12H10; molar mass = 154.2g/mol) plus 200.08 g of benzophenane froze at 59.9 °C. Calculate the Kf of benzophenane in °C*kg/mol. (b) An unknown solution with possible cations (Ag+, Hg22+, Pb2+) is treated with 6M HCl and a white precipitate forms. Hot water is added to the precipitate, and a white solid remains after filtration. The white solid is treated with aqueous NH3, and the precipitate turns grey or black. The resulting solution is treated with HNO3 and no precipitate forms. What cations can you determine to be present, absent or maybe present? Explain your reasonThe Ksp values of two solid carbonates, A2CO3 and BCO3, were determined by preparing 250.0-mL saturated aqueous solutions of both solids and then determining the concentration of carbonate by titrating it with 0.01023 M HCl up to methyl orange endpoint. Solutions of A2CO3 and BCO3 required 6.184 mL and 3.456 mL of the titrant, respectively. a. What are the concentration of carbonate in each of the saturated solutions of A2CO3and BCO3?b. What are the Ksp values of A2CO3 and BCO3? c. If 8.721 mg A2CO3 and 1.769 mg BCO3 were needed to prepare the saturated solutions, what are the identity of A2CO3and BCO3 ?Hint: deduct the molecular weight of carbonated. Instead of distilled water, 250.0 mL of 0.10 M ANO3 was used to prepare a saturatedsolution of A2CO3 while 250.0 mL of 0.10 M B(NO3)2 was used for BCO3. Which will have a higher solubility?The Ksp values of two solid carbonates, A2CO3 and BCO3, were determined by preparing 250.0-mL saturated aqueous solutions of both solids and then determining the concentration of carbonate by titrating it with 0.01023 M HCl up to methyl orange endpoint. Solutions of A2CO3 and BCO3 required 6.184 mL and 3.456 mL of the titrant, respectively.d. Instead of distilled water, 250.0 mL of 0.10 M ANO3 was used to prepare a saturatedsolution of A2CO3 while 250.0 mL of 0.10 M B(NO3)2 was used for BCO3. Which will have a higher solubility?
- If the solubility of a compound A in ether is 30g/100 ml, and the solubility of A in water is 15 g /100 ml. a) If 100 ml of aqueous solution of 3g of A are extracted twice with 100 ml ether. How much A total is extracted? b) How much A would be extracted if only one extraction, but with a volume of 200 ml of ether were extracted? c) What is your conclusion from the amount of A extracted in problems a and b above?A worker in a dye factory accidentally mixed the compound labeling and you were tasked in identifying one of the dyes. One solution states it contained a saturated 0.25302% dye by mass in ethanol solvent. By measuring its weight and volume, the density of the solution was determined to be 0.79046 g/mL. The solution was further analyzed and determined to have a concentration of 0.00239266 M pink dye. What is the molecular weight of the dye? Hint: %w/vYou were given a mixture of two miscible solvent A and B that you are tasked to separate. You know that solvent A has a boiling point of 49 oC while solvent B has a boiling point of 174 oC. Which of the listed method would overall be the most efficient? Fractional distillation Recrystallization Solid-liquid extraction Liquid-liquid extraction Simple distillation Acid-Base extraction
- Transfer 3-4 drops or a pinch of the test compound (Acetanilide) to 3 ml of the solvents, 5% NaOH and 5% NaHCO3 Shake the mixture thoroughly. The time required for the solute to dissolve in the solvent should not be more than 2 minutes. Indicate with (+) or (-) if the test compound is soluble or insoluble in the solvent. What is the theoretical solubility of Acetanilide in 5% NaOH? _______ What is the theoretical solubility of Acetanilide in 5% NaHCO3? _______A 25 mL liquid bleach sample is diluted with water to 1000 mL in a bubble gel. 25 mL of the diluted sample is transferred to the flask with a pipette, excess KI is added to it, and thus OCl- ion turns into Cl- ion and I2 is formed. The released iodine is titrated with 0.09892 M Na2S2O3 using the starch reagent, and 8.96 mL is required for the endpoint. Find the % NaOCl (w/v; w/v) in the bleach sample. (Na=23 g/mol, O= 16 g/mol, Cl = 35.44 g/mol) (Warning: solving the necessary reaction equations by writing is necessary to see the stoichiometric relationship) A. 0.132% B. 0.264% C. 5.28% D. 10.56%The Ksp of Cu3 (AsO4)2 at 25^0C is 7.6×10^-36. What is the molar solubility of Cu3 (AsO4)2 in water at 25^0C?
- You are asked to make the compound [Ni(en)3]SO4. - By using 2.611 grams of NiSO4*6H2O (s) you dissolve the sample in deionized water completely. - You then add 10ml of 25% en into the solution and mix until a single product forms - When the addition of the en is complete, you then add 15ml of ethanol and mix. - using a bench vaccine and Buchner funnel, you filter the precipitate while carefully breaking up the solid until powder form. - the product is the washed with 15ml of ethanol and 15ml of acetone. Powder the solid and leave to dry Which is the limiting reagent? Write a balanced chemical equation for the reaction. How many miles of the product can you theoretically prepare?One litre of a saturated aqueous solution of Ag2SO4 (MW = 311.79 g mol- 1) at 25 °C is evaporated to dryness. 4.844 g of Ag2SO4 residue was produced. What is the solubility product (Ksp)?The separation and purification processes given below and the method used against them are given. Which or which of these pairings are correct? I. Brewing of tea - ExtractionII. Purification of water impurities - ChromatographyIII. Separating olive pomace from olive oil while producing olive oil-DecantationIV.Petroleum fractions obtaining - Ordinary distillationV. Obtaining essential oils and using them in perfume making - Water-steam distillationA. I, II, III, IVB. I, II, III, IV, VC. I, IV, VD. I, II, III, VE. I, II, V