A student wants to find out if the black ink from a felt-tip pen is a mixture of different pigments.
She first dissolves the ink from the pen tip using a suitable liquid solvent. Some solid insoluble plastic fibers from the pen tip also mix into the liquid.
Which of these methods is best used to separate the liquid ink solution from the insoluble plastic fibers?
distillation
crystallisation
evaporation
filtration
29 exam-style questions on Edexcel IGCSE Chemistry Elements, compounds and mixtures. Each one has a worked solution and a mark scheme showing where the marks go.