1 Separation and Purification Quiz 3
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Chemistry
9th - 12th Grade
Used 1+ times
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A chromatogram of an unknown ink was developed along with common dyes. Which dyes are present in the ink?
1 & 2
1 & 4
2 & 3
2 & 4
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
A paper chromatogram of a pure compound was developed.
Which statement about the chromatogram is true?
The compound will be separated into the individual elements.
The Rf value(s) of the spot(s) observed are larger than 0.5.
A locating agent must be used to interpret the chromatogram.
There will be only be one spot on the chromatogram.
3.
FILL IN THE BLANK QUESTION
1 min • 1 pt
A student found an unlabelled bottle of white powder. He suspects that the powder is aspirin, a medicine used as a painkiller. He used chromatography to test his hypothesis. The diagram shows his chromatogram.
Calculate the Rf values of the unknown powder.
(a)
4.
FILL IN THE BLANK QUESTION
1 min • 1 pt
A student found an unlabelled bottle of white powder. He suspects that the powder is aspirin, a medicine used as a painkiller. He used chromatography to test his hypothesis. The diagram shows his chromatogram.
Calculate the Rf values of aspirin.
(a)
5.
OPEN ENDED QUESTION
5 mins • 1 pt
Is the unknown powder aspirin? Explain using the Rf values calculated in previous two questions.
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