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CaHeK987 [17]
3 years ago
15

Once the chromatographic column has been prepared, why is it important to allow the level of the liquid in the column to drop th

e level of the alumina before applying the solution of the compound to be separated?
Chemistry
1 answer:
tekilochka [14]3 years ago
4 0

Answer: Chromatography is a technique which is used for the separation of components present in a mixture into sub-components.

Explanation:

The solvent or liquid used for the separation of the chromatographic mixture should lie below the spot point where the mixture is loaded in an alumina column. This is done to prevent the air bubbles formations, which can lead to poor sanitation. Also this is done to prevent the mixing of the mixture to be separated with the solvent instead of running with the solvent via capillary action.

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3 years ago
The metalloid that has five valence electrons in the fourth electron shell is
insens350 [35]
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Explanation:

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8 0
3 years ago
Adding heat to an exothermic reaction will have what effect? Reactants ↔ products + heat View Available Hint(s) Adding heat to a
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Answer:

Causes the equilibrium to shift to the left, in favor of making more reactants, and K decreases.

Explanation:

Le Châtelier's principle states that if there is a stress in equilibrium, the reaction will shift to restore the equilibrium. An exothermic reaction loses heat for the surroundings, so the equilibrium must be represented as:

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Then, when more heat is added, to restore the equilibrium, the reaction shift to the left ("consuming" heat), in favor of making more reactants.

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Answer:

a scientific question

Procedure

Conclusion.

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