Mixtures Flashcards

All 6 cards in this deck

What is a mixture?

Two or more elements or compounds that are not chemically combined together.

What does filtration separate?

An insoluble solid from a liquid — the solid stays in the filter paper as the liquid passes through.

What does crystallisation separate, and how?

A soluble solid from its solution, by evaporating the solvent so crystals form.

Which technique gives pure water from salt solution, and why does it work?

Simple distillation — the water evaporates, is condensed and collected, leaving the salt behind.

What does fractional distillation separate?

A mixture of two or more liquids with different boiling points.

What does chromatography separate?

Substances in a mixture that dissolve in the same solvent, e.g. the dyes in an ink.