Define how the change/mistake would affect the rf value

Assignment Help Chemistry
Reference no: EM13680325

A student performed thin layer chromatography as explained in this experiment but made the following mistakes or changes in the procedure. In each case, define how the change/mistake would affect the Rf value:

A. student failed to close the container containing the developing solvent and in which the thin layer chromatography run was carried out

B. the solvent level in the developing jar was above the origin line on the thin layer chromatography sheet

C. student utilized as developing solvent, a mixture of two immiscible solvents

D. student spotted too much of a concentrated sample of the compound to be chromatographed

E. the student dozed off as well as the solvent front ran off the thin layer chromatography plate before he stopped the run

Reference no: EM13680325

Questions Cloud

Explain a solution is to be prepared with a sodium ion : Explain a solution is to be prepared with a sodium ion concentration of 0.529 mol/L. Explain what mass of sodium sulfate (g) is needed to prepare 1.54 liters of such a solution
Draw newman projections of two eclipsed : Draw newman projections of two eclipsed as well as two staggered conformations of n-butane and place them on the potential energy diagram given below according to their stability. Notice that the eclipsed and staggered/anti conformations aren't is..
Depict chair and flipped inverted chair conformations : Depict Chair and flipped inverted chair conformations of the subsequent 1, 4-dimethylcyclohexanes and circle the more stable chair conformation of each stereoisomer (cis- or trans-).
Explain if a solution containing 10 m cl- is treated : Explain if a solution containing .10 M Cl- , Br- , I- and (CrO4)2+ is treated with Ag+, in what order will the anions precipitate
Define how the change/mistake would affect the rf value : A student performed thin layer chromatography as explained in this experiment but made the following mistakes or changes in the procedure. In each case, define how the change/mistake would affect the Rf value:
Explain what are the uncertainty in measurement : An infant's pulse rate is measured to be 133 +/- 7 beats/min. Explain what are the uncertainty as well as the percent uncertainty in this measurement
Compute the volume of the ammonia gas : Ammonia at 250 degrees C at 10atm has a critical temperature of 134.5 degrees C as well as a critical pressure of 111.3 atm. Compute the volume (L) of this ammonia gas.
Explain what is the ph of the solution : Compute the molar concentration of OH- ions in a 0.525 M solution of hypobromite ion BrO-; Kb=4.0*10^-6. Explain what is the pH of the solution
Explain we have assumed that the solid doesn''t dissociate : Explain we have assumed that the solid doesn't dissociate into more than one particle when dissolved. If this was an incorrect assumption as well as the solid did dissociate slightly.

Reviews

Write a Review

Chemistry Questions & Answers

  Compute the rate constant at 17 oc

A first order reaction has an activation energy of 72.4 kJ/mol and a frequency factor (Arrhenius constant) of 1.78 x 1013 sec -1. Calculate the rate constant at 17 oC.

  A dilute electrolyte solution is prepared by dissolving iron

A dilute electrolyte solution is prepared by dissolving iron(III) chloride in water. It is found to have a freezing point

  Find the second order rate constant

Determine the second order rate constant from the initial concentration and half life and what is the second order rate constant?

  State a gauche conformation of hexane viewing down

Here are four of my question, my professors wants us to represent this newman projection and sawhorse projection. (1) a gauche conformation of hexane viewing down the C2-C3 bond

  Explain what is the molality of zn in the solid solution

The Brass is a substitutional alloy consisting of a solution of copper and zinc. A meticulous sample of red brass consisting of 82.0% Cu and 18.0% Zn by mass has a density of 8780kg/m3. Explain what is the molality of Zn in the solid solution

  Compute the enthalpy change for the reaction per mole of x

Calculate the enthalpy change for this reaction per mole of "X". Assume that the specific heat and density of the resulting solution are equal to those of water [4.18 J/g*C and 1.00g/mL ] and that no heat is lost to the calorimeter itself, nor to ..

  What mass of silver chloride will be recovered

What mass of silver chloride will be recovered if excess sodium chloride is added to 500 mL of solution containing 10.79g of Ag+?

  Once leaving the cylinder a regulator reduces the pressure

Ethylene is supplied by a 60.9-L gas cylinder initially at 2200.0 psig and 25.0°C. Once leaving the cylinder, a regulator reduces the pressure to 15.0 psig, and a valve allows 1.000 mL/s of ethylene at 25.0°C to flow into the reactor

  Compute the percent yield of c2h5cl

Calculate the theoretical yield of C2H5Cl. Calculate the percent yield of C2H5Cl if the reaction produced 176 g of C2H5Cl.

  Explain what minimum number of packages of buns

what minimum number of packages of buns, packages of patties, and jars of pickles do you need, respectively? Express your answer as three integers separated by commas.

  Explain lift equipment into the stratosphere

containing helium gas at a pressure of 31.1 atm is used to fill a weather balloon in order to lift equipment into the stratosphere. To what maximum pressure (in atm) could a 151 L balloon be filled.

  Explain what is the molecular weight of the protein

A sample of protein weighs 0.800 g and is dissolved in 50.0 mL of water. If the osmotic pressure of the solution is 10.5mmHg at 25 degrees C, what is the molecular weight of the protein

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd