MATTER CLASSIFIED

theres practice problems in the pdf + types of colloids :))

Two types of matter

Pure substances and mixtures

Two types of Pure substances

Elements and Compounds

Two types of mixtures

Homogeneous and Heterogeneous

Mixture

• two or more elements or compounds that are physically mixed together but not chemically joined

Homogeneous

Evenly mixed

Heterogeneous

Unevenly mixed

Solution definiton

Homogeneous mixture in which one substances is dissolved in another substance (consists of solute and solvent)

Solvent

substance in which the solute is dissolved

solute

substance dissolved in the solution (Particles may be ions, atoms, or molecules)

Suspension

Heterogeneous mixture of water with non-dissolve material

Suspension characteristics

• not evenly mixed

• individual components retain their own properties

• individual components can be easily seen

• can be easily seperated

• appear uniform when mixed but settle out.

Suspension examples

salt & pepper mix, rocks, cereal, bag of assorted candy, Chocolate Quik, Muddy water,Pulpy oj, Oil & Vinegar dressing

Solution characteristics

• Evenly mixed

• Properties of combined components are usually different than those of each component

• Individual components can not be easily seen

• not as easily seperated

Solubility

• amount of a substance that can dissolve in 100 grams of solvent at a given time

• ability of a solvent to dissolve a solute (depends on temp and molecular structure)

• temperature of a liquid increases = solubility of a solvent increases

brass

made of copper & zinc

Matter as mixtures

combinations of 2 or more substances where each substance retains its individual properties.

How mixtures are similar to compounds

made from two or more substances

difference between mixtures and compounds

mixtures do not form chemical bonds

Homogeneous mixture

same throughout and has a composition/properties that are identical regardless of the sample

how to identify a solution

• one phase

• uniformly mixed

• won’t settle out

• small particles

how to identify a heterogeneous mixture

• not uniformly mixed

• more than one phase

• will settle out

• larger particles

Special types of heterogeneous mixture

suspensions and colloids

Colloids

appear uniform but they do not settle out. However, their particles are too large to be classified as a homogeneous solution.