Define a Mixture. Is Mixture Composition Fixed or Variable?

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Detailed Solution

A mixture is a substance made of two or more components physically combined, and its composition is variable, not fixed. In a mixture, substances are combined but not chemically bonded. Each component retains its own properties. The ratio of substances in a mixture can change, which makes the composition variable.

Types of Mixtures

Homogeneous Mixture: Components are evenly mixed (e.g., salt in water).
Heterogeneous Mixture: Components are unevenly mixed and visible (e.g., sand in water).

Examples of Mixtures

Air (mixture of gases)
Tea (water, sugar, milk, leaves)
Soil (sand, clay, minerals)

Differences Between Mixture and Compound

Aspect	Mixture	Compound
Composition	Variable	Fixed
Bonding	No chemical bond	Chemically bonded
Properties	Each component keeps its identity	New properties appear