1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nikitich [7]
3 years ago
5

Why must the spot applied to a TLC plate be above the level of the developing solvent? What problem will ensue if the level of t

he developing liquid is higher than the applied spot in a TLC analysis?
Chemistry
1 answer:
algol133 years ago
6 0

Answer:

See explanation

Explanation:

If the spot in TLC is below the solvent front, it will be observed that the spot, instead of being separated by the solvent as expected, will just dissolve away in the solvent and zero actual separation of the mixture is achieved.

If the solute is dissolved away instead of being separated by the solvent, then the experiment fails because no actual separation of the mixture is achieved.

Hence, in TLC, the spot must be applied above the solvent front so that the capillary movement of the solvent through the plate can lead to the eventual separation of the components of the mixture since the various components of the mixture will travel at different speeds through the plate.

Also, if the solvent is above the spot, the solvent may evaporate selectively from the points above the spot while separation is ongoing.

You might be interested in
Where are the transition metals on the periodic table?
densk [106]
D. In columns 3-12 in the centre of the table
3 0
3 years ago
How many neutrons are present in an atom of element C?
Stolb23 [73]

Answer:

six  neutrons

Explanation:

there are six neutrons present in C Carbon

4 0
3 years ago
Read 2 more answers
What is the relationship between the food we eat and the energy in our body
zalisa [80]
The food we eat is can sometimes bo bad or good but it relates to the energy in our because it turns into energy and then we have strenght to do something and stay healthy.
8 0
3 years ago
Can someone please explain this to me? I need help ​
Vladimir [108]

Answer:

The order would be: X-Rays, Visible Light, and Infrared Waves.

X-Rays have the shortest wavelength out of all three, then Visible Light, and Infrared Waves have the longest wavelength of the three.

Explanation:

So basically, the LONGER the wavelength, the lower the energy. and the SHORTER the wavelength, the higher the energy. For example, Radio waves are the WEAKEST out of all the types of waves because they have the LONGEST wavelengths. Gamma Rays are the STRONGEST out of all the types of waves because they have the SHORTEST wavelengths. So Radio Waves have the lowest energy, and Gamma Rays have the highest energy.

Here is a list of all the types of waves in order from shortest wavelength to longest wavelengths:

Gamma Rays (Shortest Wavelengths, High Energy), then X-Rays would be the second strongest, then Ultraviolet waves, then Visible Light, then Infrared waves, then Microwaves, and lastly Radio Waves (Longest Wavelengths, Low Energy).

6 0
3 years ago
Read 2 more answers
A balloon sits in the sunlight causing it to heat up and explode. Which of the following
luda_lava [24]
I think it’s A, the particles of gas inside the ballon move faster and decrease pressure in
6 0
2 years ago
Other questions:
  • How many equivalent resonance forms can be drawn for co32-? (carbon is the central atom.) how many equivalent resonance forms ca
    8·1 answer
  • How do you convert 3.9mL to hL
    11·1 answer
  • What is not a chemical property of an apple?
    10·2 answers
  • The purpose of an indicator is to A. test and determine the pH values of unknown solutions. B. help acids and bases dissociate w
    14·2 answers
  • In aqueous solution the Ni2" ion forms a complex with four ammonia molecules. Write the formation constant expression for the eq
    5·1 answer
  • Two parts that make up a solution are... what
    12·1 answer
  • If a photon dropping from the n = 7 to the n = 1 level hit the surface of Au, what would be the wavelength of the ejected electr
    8·1 answer
  • 2 main reasons why we have<br> seasons.
    7·1 answer
  • The isomerization reaction, ch3nc → ch3cn, is first order and the rate constant is equal to 0.46 s-1 at 600 k. what is the conce
    12·1 answer
  • To find time, t, the age of the universe, you must first isolate the variable t. Rewrite the velocity equation v = d / t so that
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!