An evaporating dish is a simple device which is used to separate the components of a liquid-liquid immiscible mixture(with liquids of different densities).
To add impurity
Separating funnel is the simple device which is used to separate the components of a liquid-liquid immiscible mixture(with liquids of different densities). When two immiscible liquids are placed in a separatory funnel, two layers are seen. The denser solvent will be the bottom layer and the lighter one on the top.