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
Marina86 [1]
3 years ago
6

PLEASE HELP!!! Summarize the steps needed to perform paper chromatography

Chemistry
1 answer:
suter [353]3 years ago
6 0

Answer:

Hi!

I might be able to help you!

Explanation:

<u>Step 1:</u>  A horizontal line is drawn near one end (about 1.5 cm from the bottom edge) of the paper.

<u>Step 2:</u> The sample needs to be separated is placed as a small drop or line on to the paper using capillary tube. Labelling the drop by a pencil with an alphabet or number help to identify the compound later. The drops are then soaked on the paper and dried.

<u>Step 3:</u> The paper is then placed into a sealed container with a swallow layer of suitable solvent. The solvent level must be lower than the pencil line or drop on it. The container need to be covered to stop the solvent to evaporate.

<u>Step 4:</u> The solvent rises up the paper chromatography taking each component of the sample with it. The components travel with the solvent depends on three things:

-The polarity of the sample molecule. The non polar components travel faster than the polar component.

-The attraction between the sample molecule and the solvent or solvent mixture.

-The attraction between the sample and the silica.

Suppose any sample compound mixture contains three colored molecules  green, blue and red.

According to their polarity, the order of these compounds is green<blue<red.

-Thus the most non polar green will travel first along with the mobile phase.

-Then blue and at last most polar compound the red one.

You might be interested in
What is the molarity (M) of the following solutions?
Dennis_Churaev [7]

Answer:

The molarity (M) of the following solutions are :

A. M = 0.88 M

B. M = 0.76 M

Explanation:

A. Molarity (M) of 19.2 g of Al(OH)3 dissolved in water to make 280 mL of solution.

Molar mass of Al(OH)3 = Mass of Al + 3(mass of O + mass of H)

                                      = 27 + 3(16 + 1)

                                      = 27 + 3(17) = 27 + 51

                                      = 78 g/mole

Al(OH)_3 = 78 g/mole

Given mass= 19.2 g/mole

Mole = \frac{Given\ mass}{Molar\ mass}

Mole = \frac{19.2}{78}

Moles = 0.246

Molarity = \frac{Moles\ of\ solute}{Volume\ of\ solution(L)}

Volume = 280 mL = 0.280 L

Molarity = \frac{0.246}{0.280)}

Molarity  = 0.879 M

Molarity  = 0.88 M

B .The molarity (M) of a 2.6 L solution made with 235.9 g of KBr​

Molar mass of KBr = 119 g/mole

Given mass = 235.9 g

Mole = \frac{235.9}{119}

Moles = 1.98

Volume = 2.6 L

Molarity = \frac{Moles\ of\ solute}{Volume\ of\ solution(L)}

Molarity = \frac{1.98}{2.6)}

Molarity = 0.762 M

Molarity = 0.76 M

4 0
3 years ago
Is LiOH soluble or insoluble?
riadik2000 [5.3K]
LiOH is soluble. Na2CO3 is soluble. Cu(OH)2 is insoluble. 
6 0
2 years ago
Why is the r.a.m. Value used?
Andrew [12]

Answer:

The r.a.m. value is used to determine how many isotopes an element has.

Explanation:

5 0
3 years ago
Why is it important to have the International System of Units?
omeli [17]
<span>It can be used by scientists everywhere its important to have the International System of Units.</span>
4 0
3 years ago
What is the product of photosynthesis that plants make as a source of energy for their life functions? What role does this subst
kaheart [24]
Glucose. Also provides heat and energy in man
4 0
1 year ago
Other questions:
  • In the reaction Mg(s) + 2HCl(aq) → H2(g) + MgCl2(aq), how many moles of hydrogen gas will be produced from 250.0 milliliters of
    10·2 answers
  • A three-toed sloth travels eastward across a tree limb at 0.11 km/hr. After 30.0 minutes, what is the displacement of the sloth?
    11·1 answer
  • For the reaction co(g)+2h2(g)&lt;-&gt;ch3oh(g) at 700. k, equilibrium concentrations are [h2] = 0.072 m, [co] = 0.020 m, and [ch
    7·1 answer
  • How many significant figures<br> are in this number?<br> 0.00708900
    7·2 answers
  • Why does water dissolve sugar ? Explain your answer !
    15·1 answer
  • QUESTION 17
    11·1 answer
  • Determine the number of milliliters of 0.00300 M phosphoric acid required to neutralize 40.00 mL of 0.00150 M calcium hydroxide.
    11·1 answer
  • Calculate the ΔHrxn for the following
    6·1 answer
  • Will give brainliest
    14·1 answer
  • What is the LD50 of a substance?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!