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(a)
Interpretation:
The method of correcting the following error in the TLC chromatography procedure needs to be explained.
There is only one spot obtained from a mixture of two components namely 1-octene and 1,4-dimethylbenzene with retention factor 0.95 in the presence of acetone as a solvent.
Concept Introduction:
The method of separation of components of the mixture is done by column chromatography techniques. This method is used to isolate the large number of components. The movement of solvent molecules in the thin layer chromatography takes place from bottom to top but in the column chromatography, the movement of mobile phase takes place from top to bottom in the column.
(b)
Interpretation:
The method of correcting the following error in the TLC chromatography procedure needs to be explained.
There is only one spot obtained from a mixture of two components namely dicarboxylic acid and tricarboxylic acid with retention factor 0.05 in the presence of hexane as a solvent.
Concept Introduction:
The method of separation of components of the mixture is done by column chromatography techniques. This method is used to isolate the large number of components. The movement of solvent molecules in the thin layer chromatography takes place from bottom to top but in the column chromatography, the movement of mobile phase takes place from top to bottom in the column.
(c)
Interpretation:
The method of correcting the following error in the TLC chromatography procedure needs to be explained.
In the developed TLC plate, the solvent front ran off the top of the plate.
Concept Introduction:
The method of separation of components of the mixture is done by column chromatography techniques. This method is used to isolate the large number of components. The movement of solvent molecules in the thin layer chromatography takes place from bottom to top but in the column chromatography, the movement of mobile phase takes place from top to bottom in the column.
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Chapter 5 Solutions
EBK A SMALL SCALE APPROACH TO ORGANIC L
- The dissociation of the weak acid, nitrous acid, HNO2, takes place according to the reaction: HNO2 (aq) ⇌ H+(aq) + NO2–(aq) K=7.2 X 10-4 When 1.00 mole of HNO2 is added to 1.00 L of water, the H+ concentration at equilibrium is 0.0265 M.A) Calculate the value of Q if 1.00 L of water is added? B) How will reaction shift if 1.00 L of water is added?arrow_forwardSuppose a certain copolymer elastomeric material “styrene-butadiene rubber”) contains styrene ("S") monomers –(C8H8)– and butadiene ("B") monomers –(C4H6)– and that their numerical ratio S:B = 1:8. What is the mass ratio mS:mB of the two monomers in the material? What is the molecular mass M of a macromolecule of this copolymer with degree of polymerization n = 60,000? Data: AC = 12.01 u, AH = 1.008 u.arrow_forwardLab Questions from Lab: Gravimetric Determination of Calcium as CaC2O4•H2O What is the purpose of the methyl red indicator? Why does a color change to yellow tell you that the reaction is complete? Why is the precipitate rinsed with ice-cold water in step 4? Why not room temperature or hot water? Why is it important that the funnels be placed in a desiccator before weighing (steps 1 and 5)?arrow_forward
- What mass of ethylene glycol, HOCH2CH2OH, Mustbe added to 5.50 kg of water to antifreeze that would work for the car radiator to -10.0 degrees celcius? MM (g/mol): 62.07arrow_forwardWhat is the molarity of a 0.393 m glucose solution if its density is 1.16 g/mL? MM glucose 180.2 g/molarrow_forwardThe rate constant for the decay of a radioactive element is 2.28 × 10⁻³ day⁻¹. What is the half-life of this element in days?arrow_forward
- Handwritten pleasearrow_forwardChoose the best reagents to complete the following reaction. i H A B 1. CH3CH2Na 2. H3O+ 1. CH3CH2MgBr 2. H3O+ 1. CH3MgBr Q C 2. H3O+ 1. H3O+ D 2. CH3MgBr 00 OH Q E CH³MgBrarrow_forwardThe kinetics of a gas phase reaction of the form A → Products results in a rate constant of 0.00781 M/min. For this reaction, the initial concentration of A is 0.501 M. What is the half-life for this reaction?arrow_forward
- Choose the best reagents to complete the following reaction. 1. PhNa A 2. H3O+ 1. PhCH2MgBr B 2. H3O+ хё 1. PhMgBr C 2. H3O+ 00 HO Q E D 1. H3O+ 2. PhMgBr PhMgBrarrow_forwardPlease answer all of the questions and provide detailed explanations and include a drawing to show the different signals on the molecule and include which ones should be highlighted.arrow_forwardDraw the major product of this reaction. Ignore inorganic byproducts. Incorrect, 1 attempt remaining 1. LiAlH4 2. H3O+ Q OH ☑ Select to Drawarrow_forward
- EBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT
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