Predict the order of elution if you were to attempt to separate using column chromatography on silica gel and with a gradient eluent system starting with petroleum ether and slowly increasing MTBE % over time.

Answers

Answer 1

Answer:

Follows this order: B=> A => C.

Explanation:

NB: kindly check the attachment for the diagram of compounds A, B and C.

Elution is a very important concept in chromatography separation techniques. It deals with the use of eluent in the removal of an adsobate from an adsorbent. The principle behind Elution is just about how polar the solvent is.

So, in this question Compound B will go with the Elution first because of its polarity. Compound B has lesser polarity as compared to Compounds A and B.

Compound A will then elutes second because of its polarity too as resonance increases its polarity.

Last, compound C elutes because it has the highest polarity which is caused by electronegative atoms.

Predict The Order Of Elution If You Were To Attempt To Separate Using Column Chromatography On Silica

Related Questions

What must happen for an ionic bond to be created between two elements?

Answers

Answer:

they must be heated

Explanation:

At 25.0 °C the Henry's Law constant for sulfur hexafluoride (SP) gas in water is 2.4x 10 M/atm Calculate the mass in grams of SFo, gas that can be dissolved in S25. ml. of water at 25.0 C and a SF, partial pressure of 1.90 atm Be sure your answer has the correct number of significant digits.

Answers

Complete Question

The complete question is shown on the first uploaded image

Answer:

The mass is [tex]m = 0.0349 \ g[/tex]

Explanation:

From the question we are told that

The Henry's Law constant is [tex]k = 2.4 *10^{10} M/atm[/tex]

The volume of water is [tex]V = 525 \ ml = 0.525 \ L[/tex]

The partial pressure is [tex]P = 1.90 \ atm[/tex]

The temperature is [tex]T = 25 ^oC[/tex]

Henry's law is mathematically represented as

[tex]C = P * k[/tex]

Where C is the concentration of sulfur hexafluoride(SP)

substituting value

[tex]C = 1.90 * 2.4*10^{-4}[/tex]

[tex]C = 4.56*10^{-4} \ M[/tex]

The number of moles of SP is mathematically represented as

[tex]n = C * V[/tex]

substituting value

[tex]n = 0.525 * 4.56*10^{-4}[/tex]

[tex]n = 2.39 *10^{-4} \ moles[/tex]

The mass of SP that dissolved is

[tex]m = n * Z[/tex]

Where Z is the molar mass of SP which has a constant value of

[tex]Z = 146 g/mole[/tex]

[tex]m = 2.394*10^{-4} * 146[/tex]

[tex]m = 0.0349 \ g[/tex]

Which compound would you expect to be least soluble in water? Explain.
a. CCl4
b. CH3Cl
c. NH3
d. KF

Answers

Answer: a.CCl4 aka carbon tetrachloride

Explanation:

ionic compounds and polar molecules can be dissolved in water which is a polar solvent.

choice d (KF) is a salt (an ionic compound) and can be dissolved in water /(K+ and F- ions would be formed in water).

choice c (NH3 or ammonia) is a very polar molecule and thus can be dissolved in water(Hydrogen bonding).

choice b (CH3Cl) is slightly polar because the atoms surrounding the central carbon atom are different(3 H atoms and 1 chlorine atom) and can be dissolved in water(Dipole-dipole interaction).

choice a is nonpolar and cannot be dissolved in water.

Why is tape attracted to my skin? Give explanation

Answers

Answer:

Since the tape has extra electrons, it has a negative charge. When you move your finger close to the tape, electrons in your skin are repelled and move away. This makes the skin on your finger tip have a slight positive charge. Since positive and negative attract, the tape moves toward your finger.

Arrange the measurements from least to greatest

Answers

Answer: 1.8 micrograms, 1.8 milligrams, 1.8 grams, 1.8 kilograms

Explanation:

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