Types of Matter, Mixtures, and Separation Techniques

Flashcards covering matter classification, pure substances, elements, compounds, homogeneous and heterogeneous mixtures, alloys, tests for carbon dioxide, separation methods, and minerals.

Matter

Anything that has mass and occupies space.

Pure Substance

A substance consisting of the same type of particles, where all constituent particles behave identically and have fixed properties.

Element

A pure substance made up of only one type of atom that cannot be broken down into simpler substances by ordinary chemical methods (e.g., Oxygen, Hydrogen, Iron, Gold, Carbon).

Compound

A pure substance formed when two or more elements chemically combine in a fixed ratio, possessing properties different from its constituent elements (e.g., $H_2O$, $CO_2$, $NaCl$, $NH_3$).

Mixture

A substance formed when two or more substances are physically combined without chemical bonding, where components retain their individual properties and can be separated by physical methods.

Homogeneous Mixture

A uniform mixture with the same composition throughout, in which the individual components cannot be seen separately (e.g., salt solution, air, alloys).

Heterogeneous Mixture

A non-uniform mixture with different compositions at different locations, where individual components can be seen separately (e.g., sand and water, sprout salad).

Test for Carbon Dioxide

A reaction where carbon dioxide reacts with clear lime water to turn it milky, following the equation: $Ca(OH)_2 + CO_2 \rightarrow CaCO_3 + H_2O$.

Alloy

A uniform mixture of two or more metals or a metal and a non-metal, which is harder, stronger, more durable, and more resistant to corrosion than pure metals.

Brass

An alloy composed of Copper and Zinc.

Bronze

An alloy composed of Copper and Tin.

Stainless Steel

An alloy composed of Iron, Chromium, Nickel, and Carbon.

Filtration

A separation method for solid-liquid mixtures where an insoluble solid is separated from a liquid using filter paper (e.g., sand and water).

Separating Funnel

A separation apparatus and method for immiscible liquid mixtures, where the heavier liquid settles to the bottom and is drained out (e.g., oil and water).

Distillation

A separation method for miscible liquids or solutions based on differences in boiling points (e.g., recovering water from a salt solution).

Sieving

A separation method for solid-solid mixtures where particles of different sizes are separated using a sieve (e.g., flour and bran).

Magnetic Separation

A separation method used when one component of a solid mixture is magnetic and can be attracted away by a magnet (e.g., iron filings and sand).

Minerals

Natural, solid substances found on Earth with a fixed chemical composition, occurring either as compounds such as Quartz ($SiO_2$) and Calcite ($CaCO_3$), or as pure elements such as Gold and Silver.