What is the major driving force in chromatographic separation? difference in volatility in liquid phase difference in affinity with a stationary phase difference in ion interaction in gas phase difference in solubility with a mobile phase
Q: At what temperature or range of temperatures will a reaction be spontaneous if the value of H° =…
A: H° = +42.8 kJ = 42800 J S° = +331.5 J/K?
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Q: Reaction 1 Reaction 2 ? NO2 A HNO3 / H2SO4 B HNO2 / H+ SnC12 D C12 / AICI3
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A: Given :- Concentration of HCl solution = 0.01 M Volume of solution = 50.0 mL To calculate :- pH…
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Q: Which has the highest entropy? Explain your answer in a separate sheet. a. H2O(s) at −50°C…
A: Which has the highest entropy ? Explain. a) H2O(s) at -50 °C b) H2O(g) at 150 °C c) H2O(l) at 100…
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Q: What volume (mL) of a 15% (m/v) NaOH solution contains 120 g NaOH?
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Q: a) FC of nitrogen in NO3: b) FC of carbon in CO2 =
A: Given :- molecular/ion formula NO3- CO2 To determine :- FC of N in NO3- FC of C in CO2
Q: Reaction 1 Reaction 2 MCPBA ? OH OH
A: ->mCPBA is reagent used for epoxidation of alkene . ->nucleophile can open epoxide ring.
Q: 1. A solution containing 2 mL each of 4 M acetone and 1 M HCI is mixed with a solution containing 2…
A: Answer: Rate of reaction is equal to the rate of disappearance of the reactant. Since, Iodine is the…
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A: The steady-state approximation is a method used to derive a rate law. The steady state…
Q: Which element will have five electrons in its Lewis symbol? O carbon O sulfur O phosphorus O boron
A: Lewis symbol: Lewis symbol diagram is constructed by Putting dots around the element these dot…
Q: The equilibrium constant, K, for the following reaction is 9.52 x 10^-2 at 350 K: CH4(g) + CCl4(g)…
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Q: decreases or remain the same - Heating a liquid from 20⁰C to 50⁰C - One mole of water is vaporized…
A: Entropy iis degree of randomness or disorderness in system Entropy order Solids < liquids <…
Q: Which of the following metal is used for the hydrogenation of benzene? a Iron b Copper c…
A: Hydrogenation is an addition reaction in which hydrogen atoms are to the benzene ring and forms…
Q: How many grams of a KCL solution that is 1.14% KCL by mass are needed to obtain 20.4 g of sucrose?
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Q: Which of the following is capable of producing longer alkyne products? (A) Internal alkyne with…
A: alkyne is an unsaturated hydrocarbon containing at least one carbon—carbon triple bond
Q: The illustration to the left represents a mixture of hydrogen ( light blue ) and iodine ( purple )…
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Q: Give a clear handwritten answer and explain
A: Balanced the given redox reaction under basic condition and answer the following question---
Q: A buffer consists of 0.12 M NaH2PO4 and 0.33 M Na2HPO4. Phosphoric acid is a triprotic acid…
A: Given as Ka1 = 7.2 × 10−3, Ka2 = 6.3 × 10−8, Ka3 = 4.2 × 10−13 The most important Ka value…
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A: I don't know how much detail you want for this, but the simplestequation to use iswhere τ1/2 is the…
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Q: Benzoic acid (C,H$COOH) ionized to form the benzoate ion (C&H$COO'). Benzoic acid has a K=6.3 x 10%.…
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Q: Balance the following Chemical Reactions: CH:CH 0:- CO:+ H.O+ Cl CoT O2=> CO2H H2O+ H2O+ CO2=…
A: Balanced the given above reaction---
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Q: Which amomg the fragments below will be dectected by mass Spectrophotometer? i. [CH3CH3]* ii. CH3CH3…
A: We have to predict the fragment that can be detected.
Q: number of o bonds:
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Q: In Mass Spectrometry, what high energy particle is responsible is used to bombard molecule so that…
A: We have to predict the energy particles .
Q: Which of the following is capable of producing longer alkyne products? a Internal alkyne with…
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A: we need to calculate the mass of Ni(OH)2 formed in the given reaction
Q: Determine the number of electrons that the four elements below gain or lose to obtain the nearest…
A: The gaining of electron is called as reduction. the losing of electron is called as oxidation.
Q: 5. Draw a structural example of a primary, secondary and tertiary alcohol.
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Q: Which of the changes to a voltaic cell of the general form X++Y → X + Y+ would result in an increase…
A: Oxidation reaction: Removal of the electron. Reduction reaction: Addition of the electrons. The…
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Q: Assume you have a buffer containing a mixture of acetic acid and sodium acetate. Using chemical…
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A: The molecular formula of N-methylacrylamide is C4H7ON.
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Q: A solution is 0.0500 M in NH4Cl and 0.0300 M in NH3. Calculate its OH- concentration and its pH.
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Q: 1) Upon dissolving 90.0g of KNO3 in 100g of water at room temperature (20° to 25°C), a precipitate…
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Q: In a gas chromatographic run, anthracene peak was eluted at 7.50 min. The adjusted retention time of…
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Q: what is molarity, the average molarity, and standard deviation? igmsa H Titrations - Report Sheet…
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- A method of quantitative determination of the concentration of constituentsof a sample analyzed by gas chromatography is area normalization. Thiscomplete elution of all sample constituents is required. Thearea of each peak is measured and corrected for the detector response to the diffe- renteseluatos. This correction involves dividing the area by an empiricalcorrection factorDetermined. The concen ration of the analyte is found from the ratio between itscorrected and the total corrected area of all peaks. For a chromatogram containing threerelative areas were determined as 16.4; 45,2; and 30.2, in the order ofincreased retention time. Calculate the percentage of each compound if therelative responses from the detector are 0.65, 0.73 and 0.85, respectively.In stationary chromatography, the distribution (K) is the main criterion for the division of species in the sample between the two functions of the system, which factors depend onWhich statements are true for molecular exclusion chromatography?I Molecular exclusion chromatography separates on the basis of size.II Small molecules that freely pass through the stationary phase, Kav = 0.III Small molecules can fit in the pores of the stationary phase and effectively pass through a larger volume, and elute last.IV The pores in the stationary phase are too small for large molecules to pass through, so large molecules elute last.V Molecular exclusion chromatography with a hydrophilic stationary phase and an aqueous solvent is called gel permeation chromatography. A. II and V B. I, II, and IV C. III, IV, and V D. No correct combinations given above E. I, III, and IV F. I, II, III, and V
- True or False: Liquid-solid phase column chromatography is used to separate large up to multigram amounts of mixtures, based on their differences (however small) in polarity.Which statements are true for molecular exclusion chromatography?I Molecular exclusion chromatography separates on the basis of size.II Small molecules can fit in the pores of the stationary phase and effectively pass through a larger volume, and elute last.III The pores in the stationary phase are too small for large molecules to pass through, so large molecules elute first.IV Molecular exclusion chromatography with a hydrophilic stationary phase and an aqueous solvent is called gel permeation chromatography. A. I, II, III B. III and IV C. II only D. I and II only E. I, III, and IVCan paper chromatography be used to separate and identify very volatile substances? Why? Please explain comprehensively.
- What are the disadvantages of uses the Thick layer stationary phase in Thin layer Chromatography (TLC)? Please shortly answer at your own words. Answer should be to the point ( specific 4-5 lines).You have obtained a gas chromatogram of a two component mixture of compounds A and B. The height of peak A is 3.84 cm. and the width at half height is 1 cm. The height of peak B is 3.49 cm. and the width at half height is 1.36 cm. The percentage of a component in the mixture is proportional to peak area. Estimate peak areas by multiplying height by width at half height. What was the percentage of compound B in the mixture? (Enter your answer as a number without any percent symbol or the word percent.)In molecular exclusion (size exclusion) chromatography, the molecules have the longest retention times. a) the larger molecules b) the smaller molecules
- The identity of a volatile petroleum residue is determined by the (size, pattern) of its gas chromatogramIon exchange chromatography can be used to separate a mixture of cations and anions, true or false?Explain the following terms used in chromatography i) Dead time ii) Number of theoretical plates Describe the sample properties that would be suitable for; i) Gas chromatography (GC) analysis ii) High-performance liquid chromatography (HPLC) analysis