Experiment 3

Please explain your answer ASAP

Which statement(s) are correct for gas chromatography? A) the components in a mixture can be identified from their retention time. B) the relative peak areas give the proportions of components in a mixture. C) Calibration curves are used to confirms the concentrations of components in a mixture.

1.  All chromatography involves a solid phase, and mobile phase.  In thin layer chromatography the solid phase is the silica layer on a piece of glass, and the mobile phase is the organic solvent that will travel along the TLC plate. which direction will the mobile phase (the organic solvent) travel?  A) UPWARD B) DOWNWARD C) HORIZONTALLY LEFT TO RIGHT

The uses of thin layer chromatography are: 1) To identify unknown compounds 2) Determine purity of products 3) Analyze reaction mixtures 4) To waste time in lab 5) Determine the melting point of the product U 6) Put an astronaut on the moon.

what is chromatography? Explain different types of chromatography and explain how to seperate compounds. indicate stationary phase mobile phase.

Based on the first set of numbers, please help solve the rest.

This is the graph for gel filtration chromatography. Can you please explain why the graph has the maximum and minimum peak and relate it with the gel filtration concept such as the volume of elution, molecular weight, and so on. Thank you . Graph for Result 1: (Volume of elution (mL) with 1% bromophenol blue) Volume of Elution (mL) vs Corrected OD 1.789 1.8 1.6 1.4 1.2 0.745 0.8 0.477 0.6 0.379.400.452 0.406 0.393 0.254 d28 0.25 0.4 9:128 0.161 0.115 0.2 0.060 2 6. 10 12 14 16 Volume of Elution (mL) Corrected OD

5. What would be the effect of the following errors in chromatographic work? a. The solvent level in the developing chamber or beaker is higher than the spotted sample b. Too much sample is applied to the paper or plate C. Sample spots are too close to each other d. The paper or plate is allowed to remain in the chamber after the solvent front has reached the top of the paper or plate 6. Differentiate normal phase chromatography from reverse phase chromatography. From which of the two governs the video demonstration in TLC and paper chromatography? How do you say so?

calculate the following for each sample gas chromatograph.  a) retention time for each peak (label peaks) b) area of each peak c) %composition  Sample GC of starting material for distillation of solution that is 40% ethyl acetate and 60% propyl acetate.

PART1: Put True (T) or False (F) for the following sentences: 1. chromatography" derived from two Greek words "Chroma" meaning color and "graphein" meaning to write. The stationary phase may be a solid, or a liquid supported on a solid or gel. 3. The mobile phase may be 2. Solid. 4. Silica gel is the most common stationary phase in adsorption chromatography. 5. Liquid Chromatography abbreviated as (GC ). 6. In Thin Layer Chromatography, the mobile phase is gas. 7. a = KB/KA, where Kg is the distribution constant. 8. k'B and k'A are the retention factors. 9. Rf, is the distance traveled by the compound ONLY. 10. Chromatography is a physical method of separation.

Please help

Task: You are a forensic analyst employed at the Baltimore County Forensic Lab. You plan to perform paper chromatography on the ink from the note and a sample from the marker. Permanent marker ink is non-polar. You need to select the best solvent to use as the mobile phase in order to compare the ink sample and determine if they may be a match. The solvents you have available to you are carbon tetrachloride and water.Which solvent would be best to analyze the ink samples using paper chromotography?Your explanation should include:•    the name of the liquid solvent that should be used for the paper chromatography analysis•    scientific reasoning for your choice of the liquid solvent that will be used•    the Lewis structures for carbon tetrachloride, CCl4, and water, H2O•    how the shape and symmetry of each molecule influences its polarity

You spotted a mixture of three compounds, labeled A-C, on a silica plate. The resulting thin layer chromatography (TLC) plate with a mobile solvent mixture of 95 % hexanes and 5 % ethyl acetate is shown below. Which of the spots traveled the furthest up the TLC plate corresponding to spot 3?

I'm doing lab report for thin layer chromatography right now, but I'm struggling with a question about how the polarity affect separation. Please help me answer and explain it. Thank you so much!

sub= 18 help

Which of the following statements is incorrect? O A. In reversed-phase chromatography, the stationary phase is nonpolar. B. In reversed-phase chromatography, increasing the mobile-phase polarity increases the elution time. C. In reversed-phase chromatography, most polar component is eluted last. D. In normal-phase chromatography, the most polar component is eluted last. E. In normal-phase chromatography, the stationary phase is polar.

Preparing a Thin Layer Chromatography experiment there are some common mistakes. Explain what happens in this situation: Sample spots too big

Use the following information and data to answer the question. A student is performing a paper chromatography experiment. He spots two sample compounds (compound A and compound B) on the origin line at the bottom of his paper. He then places the paper into a beaker with a centimeter or so of liquid solvent and allows it to develop until the solvent front is near the top of the paper. Compound A eluted 8.23 cm up the paper. Compound B eluted 4.77 cm up the paper. The solvent front (distance solvent eluted) was measured at 10.46 cm from the origin.   In terms of the properties of the two samples (A and B) it can be said: a) sample A has the highest affinity for the paper b) sample B has the highest affinity for the paper c) the affinities of the samples are the same d) sample B has the lowest affinity for the paper