Pure Substances and Mixtures Flashcards

Pure Substances

• Pure substances consist of a single type of particle and have uniform properties throughout.
• Sugar (C6H12O6) is a pure substance, representing a single chemical compound.
• Iron is a pure metal and an element, characterized by its unique physical properties.
• Gold is a pure element, known for its malleability and conductivity.
• Water (H2O) is a pure substance, essential for life, it consists only of hydrogen and oxygen molecules.
• Baking soda (sodium bicarbonate, NaHCO3) is a pure chemical compound commonly used in baking.
• Elements such as carbon are considered pure substances, as they cannot be broken down into simpler substances.
• Hydrogen molecules (H2) are also a pure substance, representing the simplest form of matter.
• Oxygen (O2) is a diatomic molecule and a pure gas crucial for respiration.
• Carbon dioxide (CO2) is a pure compound, formed from carbon and oxygen atoms.
• Atoms represent the simplest form of pure substances, the basic building blocks of matter.
• Compounds are pure substances formed from two or more elements chemically bonded in fixed proportions.

Mixtures

• Mixtures consist of two or more substances combined physically, retaining their individual properties.
• Salad dressing is a mixture, typically containing oil, vinegar, and spices, with components that can be separated.
• Milk is a colloidal mixture of fat globules and water along with dissolved lactose and proteins.
• Fish tank water is a mixture containing various dissolved minerals, beneficial bacteria, and organic matter.
• Atmospheric air is a mixture of gases, primarily nitrogen, oxygen, carbon dioxide, and trace gases.
• Smarties and nuts together form a mixture that retains their separate identities and properties.
• Colored water is a mixture where dyes or pigments are dispersed in water.
• Cake mix is a combination of different dry ingredients that are mixed but not chemically altered.
• Solutions typically consist of a solute dissolved in a solvent, such as saltwater.
• Iced tea is a mixture of tea, water, and possibly additional flavorings or sweeteners.
• A muddy pond is a mixture comprising water, soil, and organic matter, creating a turbid solution.
• Coke is a carbonated beverage and a mixture containing sugar, water, and various flavorings.
• The pit of balls is a physical mixture where individual balls maintain their distinct characteristics.

Explore the fascinating world of pure substances and mixtures with these flashcards. Each card features definitions and examples to help you distinguish between the two categories. Perfect for science students looking to reinforce their knowledge!