WorksheetsChemical Analysis
Total questions: 31
Worksheet time: 31mins
What colours are in the black ink? (Tick all correct answers)
Red
Blue
Green
Brown
Yellow
(a) is least soluble in the solvent because it (b) up the paper
Calculate the Rf Value
Give your answer to 2 significant figures
(a)
What is apparatus X on Figure 6?
Boiling Tube
Condenser
Funnel
Watch Glass
Calculate the mean mass of solid.
Do not include the anomalous result in your calculation.
Give your answer to 2 significant figures.
(a)
What change of state is happening at the surface of the sea water in Figure 7?
Melting
Freezing
Evaporating
Condensing
The water in the test tube in Figure 7 is has (a)
Match the following
Mixture
Air
Compound
Carbon Dioxide
Element
Oxygen
Match the following
Limewater
Carbon Dioxide
Glowing Splint
Oxygen
Lit Splint
Hydrogen
Litmus Paper
Chlorine
Which substance is a mixture?
Air
Gold
Methane
Nitrogen
Chromatography involves a stationary phase and a mobile phase.
Draw one line from each phase to what is used for that phase.
Mobile Phase
Solvent
Stationary Phase
Chromatography paper
Origin Line
Pencil Line
Solute
Food Colouring
To test for hydrogen use (a) a positive result will (b)
To test for chlorine use (a) a positive result will (b)
Emissions from cars that burn fossil fuels contain carbon dioxide. What is used to test for carbon dioxide?
Burning Splint
Glowing Splint
Limewater
Food colourings are often mixtures of dyes.
What name is given to mixtures that are designed as useful products?
(a)
What 2 statements are not conclusions that can be drawn about they dyes?
Y contains 3 dyes
Y contains 2 known dyes
Y contains an unknown dye
Y contains only 1 dye
Y contains green
Calculate the Rf value using the information provided
(a)
What is used to test for oxygen gas?
A burning splint
A glowing splint
Damp litmus paper
Limewater
Match the error to the description
The ink will mix with the solvent
Start line in ink
The ink will dissolve
Solvent above the start line
The solvent will evaporate
No lid on the ink
Which ink is the least soluble?
Red
Blue
Green
Yellow
Brown
Which ink is the most soluble?
Red
Blue
Green
Yellow
Brown
Which ink is the colours does brown contain?
Red
Blue
Green
Yellow
Unknown
Why was the green colour still on the start line at the end of the experiment?
Left too long
The green colour was insoluble in the solvent
The green spot contained too many colours
The green spot was too small
Unknown
Calculate the distance moved by the solvent value
(a)
Hydrogen gas is a product of cracking.
What is used in the test for hydrogen gas?
Burning Splint
Glowing Splint
Limewater
When damp litmus paper is put into chlorine gas
the litmus paper turns (a)
Chromatography is used to separate mixtures.
Chromatography involves a mobile phase and one other phase.
What is the other phase in chromatography?
Moving phase
Recycled phase
Stationary phase
Viscous phase
In chromatography the substances in the mixture separate in the mobile phase because they have different (a)
How many spots will be produced on the chromatogram of a pure compound?
(a)
In a chromatography experiment, a blue colour moved 4.77 cm.
The solvent moved 5.30 cm.
Calculate the Rf value for the blue colour.
Rf = Colour Distance / Solvent Distance
(a)
Black ink is a mixture of several colours.
Reorder the following steps using paper chromatography to:
• separate the colours in black ink
• identify the colours from their Rf values.
Draw an origin line in pencil
Add the ink spot to the origin line
Place in the solvent, making sure the solvent is below the origin line
Allow the solvent to move up the page, remove before the end and dry
Measure the distance of the spots and the distance of the solvent front
