Mixtures and Their Classification

Vocabulary flashcards covering the definitions and properties of mixtures, homogeneous mixtures, pure substances, solutions, and heterogeneous mixtures.

Mixtures

Combinations of two or more substances in which the individual substances keep their own properties, can have variable proportions, and can be separated physically.

Homogeneous mixture

A mixture in which the composition is uniform throughout, with no visible boundaries, and where the components are evenly distributed throughout the entire mixture.

Pure substance

A form of matter whose composition is always the same or constant regardless of the source or the way it is made, such as $NaCl$, which is always formed in a ratio of $23$ to $35.5$ by mass.

Solution

A homogeneous mixture formed by combining substances in various proportions, such as $5\,g$ or $10\,g$ of $NaCl$ in $100\,g$ of water, or sugar dissolved in water.

Heterogeneous mixture

A mixture that consists of physically distinct parts, each with different properties, and has at least two visible phases, such as mixtures of oil and water, wood ash and water, or sand and water.