Matter Chemistry

January 15, 2018 Off By admin
Question Answer
Physical property. A quality than can be observed without changing the composition.
Examples of physical properties. Density, color, mass, weight, volume.
Physical changes. A change in physical properties where no new substance is formed.
Chemical property. The ability/inability for a substance to react.
Examples of physical changes. Phase changes.
Chemical change. A new substance is formed.
Evidence of chemical changes. Precipation, gas produced, heat, light, water forms, explosion, color change, odor change, electricity, destruction of old, creation of new,
Liquid to gas. Evaporation/Vaporization
/Boiling.
Example of sublimation. Dry ice (carbon dioxide) and iodine.
Liquid to solid. Freezing/Solidification/
Crystallization (separates by formation of a solid, pure particles from a solution)
Solid to gas. Sublimation.
Gas to solid. Deposition.
Examples of deposition. Freezer burn and frost.
Matter. Anything that takes up space and has mass.
True or False: The reactants can have different chemical properties than the product of a compound. True.
Ability to react with oxygen. Combustibility.
Ability to be pulled into a wire. Ductility.
Tendency to corrode. Rusting.
Law of Conservation of Matter. Mass is neither created or destroyed in chemical reactions.
Definite shape, definite volume. Solid.
How solids move. Vibrations.
YO
Indefinite shape, definite volume. Liquids.
Liquids ___________ when heated. Expand.
How liquids move. Slide/Flow.
Indefinite shape, indefinite volume. Gas.
Gases are _____________. Compressible.
How gases move. In a constant random straight line motion.
Two types of matter. Pure substances and mixtures.
Two types of pure substances. Elements and compounds.
Only one type of atom, cannot be decomposed. Element.
Two or more different types of atoms chemically combined. Compound.
Two types of elements. Monotomic and diatomic.
Diatomic element examples. Br, I, N, Cl, H, O, F.
Have fixed ratios, can be separated chemically. Compounds.
Variable composition, two or more pure substances physically combined. Mixture.
Two types of mixtures. Homogeneous and heterogeneous.
Evenly mixed, solutions, uniform. Homogeneous.
Separated by distillation. Homogeneous.
Separated by filtration, unevenly mixed. Heterogeneous.
Examples of heterogeneous mixtures. Oil and water.
AKA molecule. Diatomic element or compound.
Product's properties are different than the reactants'. Compound.
Example of a compound's change in chemical properties. Fe and Sulfur combine with heat and change color and are no longer magnetic.
What is filtration based on? Particle size.
What is distillation based on? Vaporization and condensation, different boiling points.
Separates based on movement through a special paper. Chromatography.
Could distillation occur without the burner? No, because it causes vaporization.
What types of phase changes are involved in distillation? Vaporization and condensation.
Why must you replace the collection flask over time? So the other substance doesn't vaporize.
How do you tell how many liquids there were in the original solution? By how many boiling points are listed.
Why can't you see salt until distillation occurs? It was mixed into the liquid.
How are diamond and graphite similar? They are both a form of carbon.
How are 02 and 03 similar? They are both gases.
What is O3? Ozone.
Two or more forms of an element in the same phase. Allotropes.
What is different in allotropes? Molecular arrangements, physical properties, chemical properties.