Consider the following six terms - Leaving Cert Chemistry - Question a - 2014
Question a
Consider the following six terms.
reflexion
fractionation
recrystallisation
distillation
chromatography
steam distillation
In your answer book, match any five of t... show full transcript
Worked Solution & Example Answer:Consider the following six terms - Leaving Cert Chemistry - Question a - 2014
Step 1
A. Separation of the coloured components of a mixture using a solvent as the mobile phase and a suitable solid as the stationary phase
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Answer
This describes chromatography, which is a technique used for separating mixtures based on differential affinities of substances.
Step 2
B. Separation of two liquids on the basis of their different boiling points
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Answer
This can refer to both distillation and fractionation. Distillation is used for separating liquids based on boiling points and is a simpler process. Fractionation is a more precise process used for more difficult separations.
Step 3
C. Dissolving impure crystals in the minimum amount of hot solvent and then filtering the mixture after allowing it to cool
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Recrystallisation is the term for this technique, which purifies solid compounds by dissolving them and then reforming crystals.
Step 4
D. Separation of several substances in crude oil on the basis of difference in boiling points
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This describes fractionation, a method used for separating different components from crude oil based on their boiling points.
Step 5
E. Boiling a reaction mixture without loss of material, thus giving time for reaction to occur
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This process is known as refluxing, which allows a reaction mixture to be heated while minimizing the loss of volatile components.
Step 6
F. Extraction of clove oil from cloves (or similar extraction of another oil)
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This typically refers to steam distillation, a method used to extract essential oils from plant materials.
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