Question

explain or define the following:
mixture vs pure substance

heterogenous mixture

homogeneous mixture

separating mixtures

Explanation:

• Mixture vs Pure Substance: A pure substance has a fixed composition (element or compound, e.g., gold, water). A mixture is two+ substances physically combined (e.g., salt - water, air), with variable composition.
• Heterogeneous Mixture: A mixture where components are not uniformly distributed; you can see distinct phases (e.g., salad, sand - water).
• Homogeneous Mixture: A mixture with uniform composition throughout; appears as one phase (e.g., sugar - water, air).
• Separating Mixtures: Processes to separate components of a mixture (e.g., filtration for solids from liquids, distillation for liquids with different boiling points) since mixtures retain component properties.

Answer:

• Mixture vs Pure Substance: Pure substance (fixed composition, element/compound); Mixture (2+ substances, physical mix, variable composition).
• Heterogeneous Mixture: Non - uniform, distinct phases (e.g., salad).
• Homogeneous Mixture: Uniform, single - phase appearance (e.g., sugar - water).
• Separating Mixtures: Processes (filtration, distillation) to separate mixture components.