Practise laboratory apparatus, separation, titration, chromatography and qualitative tests across the CAIE IGCSE Chemistry experimental techniques unit.
Which piece of apparatus is used to measure 24.5 cm3 of gas produced during a reaction?
beaker
conical flask
measuring cylinder
volumetric pipette
C
An acid-base titration is described.
- 25.0 cm3 of dilute aqueous alkali is put into a conical flask.
- Indicator is added to the flask.
- Dilute acid is added to the aqueous alkali until the indicator changes colour.
- The volume of acid used is then recorded.
Which use of apparatus is correct?
The 25.0 cm3 of aqueous alkali is measured using a volumetric pipette.
The 25.0 cm3 of aqueous alkali is measured using the lines on the conical flask.
The volume of acid is measured using a measuring cylinder.
The volume of acid is measured using a volumetric pipette.
A
Which statement about paper chromatography is correct?
A solvent is needed to dissolve the paper.
Paper chromatography separates mixtures of solvents.
The solvent should cover the baseline.
The baseline should be drawn in pencil.
D
Fermentation of sugar produces a mixture of ethanol solution and solid yeast.
How is the solid yeast removed from the mixture?
crystallisation
distillation
filtration
fractional distillation
C