UNIT 4 HONORS CHEMISTRY

Chemical Reactions

C₂H₃O₂^-

Acetate

NH₄⁺

Ammonium

Sb³⁺

Antimony

Cr₂O₇^2-

Dichromate

C₂O₄^2-

Oxalate

Ag⁺

Silver

Zn²⁺

Zinc

O₂^-2

Peroxide

ic means -ate and ous means -ite

how to write acids

dissolved in water

aq

neither created nor destroyed

in a chemical reaction atoms

1. color changes

2. formation of a solid

3. formation or release of a gas

4. change in energy (heat or light)

evidence scientists look for to determine if chemical reaction occurred

precipitation, reactants are aqueous and products are solid

double replacement

crystals so they are SOLID

ionic compounds, metal and nonmental…

aqueous, water

ionic compounds are ___ if ____ is present

usually gases, sometimes liquids

molecular compounds (all nonmetal)

involves transfer of electrons

redox reaction

always zero

atom oxidation #

usually zero in covalent cds

oxygen oxidation #

always -1

in cds fluorine oxidation #

+1 (in covalent cds w/ nonmentals)

hydrogen oxidation #

hydrocarbon (g) + O₂ (g) —> CO₂ (g) + H₂O (g) + energy

combustion

containing alkali metal, ammonium, nitrate, chlorate

nonmetal and metal cd is always zero when