Unit 2: How do we use matter? Flashcards
What are the two types of mixtures?
Heterogenous and homogenous mixtures
What are the two types of mixtures?
Heterogenous and homogenous mixtures
What is a homogenous mixture?
Mixture with an even distribution of constituents resulting in a uniform composition throughout and therefore has uniform properties.
What is a heterogeneous mixture?
Mixture with an uneven distribution of constituents resulting in a non-uniform composition. The physical and chemical properties will vary throughout the mixture.
What is a phase?
A phase is a system that is homogenous in physical and chemical terms. A phase is a distinct and homogenous state of a system with no boundary separating it into parts, but a phase is separated from other phases by a boundary layer.
What is the difference between miscible and immiscible liquids?
Miscible is when two liquids mix evenly with each other to form one homogenous solution with a uniform composition that will exist in one phase.
Immiscible is when two or more liquids do not mix with one another and they will form two distinct layers. They exist in separate phases and even when mixed and shaken, they will not mix.
How is a solution formed?
A solution is formed when a solid solute is dissolved in a liquid solvent.
What is a suspension?
A suspension is a heterogenous mixture made of insoluble solid particles which are dispersed in a liquid or gas.
What is a colloid?
A colloid is a type of mixture where the particles of one or more substances are dispersed in a medium. Colloids are heterogeneous mixtures, although they do have some characteristics of homogeneous mixtures.
What is an emulsion?
It is a mixture and a type of colloid where the tiny particles suspended in a substance will not mix or dissolve.
What is osmosis?
Osmosis is a separation method where a semi-permeable membrane allows only water molecules to pass through. Osmosis diffuses the water molecules from a region where the water molecules are in high concentration to a region of low concentration.
What is simple distillation?
Simple distillation is a method for separating the solvent from a solution based on differences in boiling point. When the solution is heated, the solvent will start to evaporate. When it turns into its gas state, it rises and enters a condenser, which is then cooled back to a liquid into a separate container.
What is chromatography?
Chromatography is a separation method used to separate soluble substances, normally colored substances such as dyes, inks and food coloring.
What methods are used to separate solids?
Sieving, magnet, and physical means
What methods are used to separate solids from liquids?
Filtration, evaporation, crystallization, and decantation
