初三化学第一章知识点总结.pdf

初三化学第一章知识点总结

Chapter1:XXXChemistry

Topic1:ChangesandPropertiesofMatter

I。ChangesofMatter

1.n:Physicalchange-achangethatdoesnotXXX:melting

ofwax。freezingofwater。andnofgasoline。Chemicalchange-

achangethatXXX:nofcoal。rustingofiron。foodspoilage。

andn.

2.Criteriaforjudgingchanges:XXXaregenerated。Ifyes。

itisachemicalchange。ifnot。itisaphysicalchange.

3.nshipeenchanges:XXXchanges。butphysicalchangesdo

notXXX.

4.XXXpanyingchemicalchanges:Releaseofheat。nofheat。

noflight。changeofcolor。nofgas。andnofprecipitate.

XXX

1.Physicalproperties:XXX。Theseincludecolor。state。

odor。meltingpoint。boilingpoint。density。hardness。XXX。

XXX。etc.

2.Chemicalproperties:XXX。acidity。etc.

III。Differencesandnseenphysicalchanges。chemical

changes。physicalproperties。andchemicalproperties.

Concepts

XXX

XXX

Examples

nships

Concepts

XXX

Examples

XXX

XXX

Physicalproperties

XXX.

XXX.

Color。state。odor。meltingpoint。boilingpoint。density。

hardness。XXX。XXX。etc.

XXX.

XXX.

Chemicalproperties

XXX.

XXX.

Flammability。acidity。etc.

Canbeknownonlythroughchemicalchanges.

Physicalchanges

XXXdonotXXX.

Changesintheshapeorstateofmatter.

XXXaregeneratedduringthechange.

Meltingofwax。freezingofwater。nofgasoline。etc.

Chemicalchanges

XXX.

XXX.

nofcoal。rustingofiron。foodspoilage。n。etc.

XXXchanges。XXX.

Topic2:ChemistryisanExperimental-BasedScience

XXX

1.XXX:XXX。emittingredlight。Theflameisdividedinto

threelayers(outerflame。innerflame。andflamecore).

2.Products:Carbonxideandwater

n:Carbonxide-abeakercoatedwithclearlimewateris

placedabovetheflame(thewaterturnscloudy)。Water-ac