Are separations of mixtures physical or chemical changes? Explain.
Chemistry 1010 8/30/2017-9/1/2017 “Are all rocks the same” Granite -Heterogeneous: we can see boundaries. Mixtures. Can separate -granite is composed of different rocks that have been crushed together Chert -Homogeneous: we don’t see boundaries -property: if striked just right it will fall into flakes Distinguish Properties into 2 types 1. Physical -Changes that do not alter composition 2. Chemical -properties that a substance has that is involved in changing into another substance Techniques used for separating samples of matter Heterogeneous separated by -sorting, decanting, filtration Homogeneous separated by -distillation, crystallization (salt, sugar), chromatography Greek P