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
Aleksandr-060686 [28]
3 years ago
12

A student is comparing two samples of crystalline organic solids. A TLC analysis shows a single spot for each sample and the co-

spot with the same Rf value. Which of the following would provide the most conclusive evidence that the two samples are the same compound?
-rerun the TLC using more developing solvent
-rerun the TLC on a longer TLC plate
-Perform a mixture melting point
-mix the substances and run the TLC as a single spot
Chemistry
1 answer:
Digiron [165]3 years ago
5 0

Answer:

Rerun the TLC using more developing solvent

Explanation:

The TLC principle envolves the interaction of the samples with the solvent and the stationary phase.

For the solvent you are using at the moment, the interaction with the sample may be very similar for both cases depending with the polarity, what could indicate an equal value.

If you develops a new solvent with a different polarity, you can see if the samples are the same compound or not. Because a more polar compound will interact more with the stationary phase and a more non-polar compound will interact more with the solvent.

You might be interested in
Summarize at least three steps needed to carry out Galileo's famous experiment to determine whether heavier objects
LenaWriter [7]

Answer:

Explanation:

According to legend, Galileo dropped weights off of the Leaning Tower of Pisa, showing that gravity causes objects of different masses to fall with the same acceleration. In recent years, researchers have taken to replicating this test in a way that the Italian scientist probably never envisioned — by dropping atoms. One of Galileo's contributions to the founding of modern science was his study of falling objects.  He turned, then, to measuring the acceleration of objects rolling down smooth ramps. The ramp "diluted" the acceleration to a value small enough to allow accurate measurements of the longer time intervals.

6 0
2 years ago
The isotopes K-37 and K-42 have the same
Masteriza [31]

Answer:

the same number of protons

Explanation:

5 0
3 years ago
Read 2 more answers
if you are using a formula where you need the change in temperature, explain why it is not important whether your temperatures a
alexandr1967 [171]

Answer:

This is because, Kelvins and Celcius degrees both agree at fixed points i.e; the lower fixed point and upper

5 0
3 years ago
The main purpose of following the course of a reaction by TLC is to: Group of answer choices Determine if all the starting mater
kakasveta [241]

Determine if all the starting material is converted to the product.

<h3>What is TLC?</h3>

Because it can provide immediate and important information about a sample's purity and whether or not a reaction is still ongoing, TLC is a common technique in the organic chemistry lab. A TLC plate can be finished in less than 5 minutes when low polarity solvents are used.

<h3>Uses of TLC:-</h3>

TLC is a chromatographic method used to separate mixtures that are not volatile.

Thin-layer chromatography can be used to:-

  • Assess a substance's purity.
  • Identify the compounds present in a particular combination.
  • Track the development of a reaction.

Learn more about TLC here:-

brainly.com/question/14393140

#SPJ4

7 0
2 years ago
What was Thomson's model of the atom called?
trasher [3.6K]
The answer is C: The plum-pudding model
3 0
3 years ago
Other questions:
  • An atom of 135I has a mass of 134.910023 amu. Calculate the binding energy in MeV per atom. Enter your answer with 4 significant
    7·1 answer
  • What is the empirical formula for a molecule containing 46.8% Si and 53.2% O?
    5·1 answer
  • If you set up an experiment with two different independent variables, then the results would be_____.
    7·1 answer
  • Calculate the ΔG for the following system. Then state if the system is spontaneous or not spontaneous.
    10·2 answers
  • What properties can you use to identify if a substance is salt, baking soda or cornstarch?
    14·2 answers
  • WILL MARK BRAINLIEST
    13·1 answer
  • For a beryllium-gold voltaic cell containing Be2+(aq) and Au3+(aq) solutions, do the following. (a) Identify the cathode. (Inclu
    13·1 answer
  • What do valence electrons determine about an element?
    5·1 answer
  • Both of janies parents have dark hair. how likely is janie to have blonde hair? ​
    8·1 answer
  • Write the name for the compound whose formula is shown here<br><br> Ca3(BO3) 2
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!