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C2.1 Purity and separating mixtures Flashcards | StudBud
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C2.1 Purity and separating mixtures
C2.1 Purity and separating mixtures
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To go with the new 1-9 OCR Gateway Chemistry 2017
Flashcards
16 cards
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Questions
16
Answers
1
What process is used to separate out inks with different solubility?
gas chromatography
Paper chromatography
electrolysis
fractional distillation
2
How do you separate two liquids with different boiling points?
Evaporation
Filtration
Crystillisation
Distillation
3
What is the empirical formula of C6H12O6?
CHO
C2H2O
C2HO2
CH2O
4
What is the relative atomic mass of oxygen?
8
20
13
16
5
What is the relative atomic mass of carbon?
6
1
12
14
6
What is the empirical formula of C2H4?
C2H
CH
CH2
C2H4
7
More soluble inks will have...
a longer retention time
a greater Rf value
a higher solubility factor
more attraction to the stationary phase
8
What property can you use to determine the purity of a substance?
boiling point
melting point
crystallinity
solubility
9
What is the relative formula mass of carbon dioxide CO2?
16
30
44
28
10
Which is the best science subject?
Physics
Biology
Chemistry
11
How do you separate a dissolved substance from water?
Crystillisation
Distillation
Filtration
Evaporation
12
How do you separate a solid from a liquid?
Filtration
Distillation
Crystillisation
Evaporation
13
What is the empirical formula?
The number of atoms of each element in a molecule
The number of elements in a molecule
The simplest whole number ratio of elements in a molecule
The mass number of a molecule
14
What is the relative formula mass of carbon monoxide CO?
30
12
28
16
15
chromatography always has...
a moving phase and stationary phase
a mobile phase and paper phase
a mobile phase and stationary phase
a mobile area and stationary area
16
What is the molecular formula?
The mass number of a molecule
The simplest whole number ratio of elements in a molecule
The number of atoms of each element in a molecule
The number of elements in a molecule
