Chemistry Chemical equations

How should your write water in this unit

HOH

reactants

starting substance

Products

substance formed in reaction

S

solid 

L

liquid

g

Gas

Aq

dissolved in water

Arrow with two ends

reaction can go both way

+

separates things

Arrow with a triangle above 

heat is added 

Arrow

separates reactants from products

Arrow with KI above it

uses catalyst to speed up reactions

what is the synethis reaction 

A+B=AB

Decomposition

AB= A+B

When you use PAI in decomp what should you do

separate them only this time

Single replacement 

A+BC= B+AC

What do you do with PAI in single replacement reaction

carry over the subscript

What special chart do you use for single replacement

reactivity series

Double replacement 

AB+CD=AD+CB

What do you switch in double replacement

metals

What type of matter are the reactants in double replacement

aq

What are some things that show double replacement took place 

formed precipitate(solid)

Acid-based neutralization (water)

Formation of gas(bubble out of reaction)

Soluble

(aq)

Insoluble

S

Net Ionic 

only showing the ions involved in the a chemical change 

Spectator ions

ions that do not participate in a chemical change

What is the evidence of a chemical reaction

change in temp, color, odor

Presence of a solid(precipitate)

Formation of gas bubble

Chemical reactions

Process by which one or more substances are rearranged to form different substances

Combustion 

Cx+Hy + O2= CO2+H20

How should you balance a combustion problem

C, H, O

What type of compounds do double replacement have

ionic

Redox reaction

the transfer of electrons

Oxidation 

helps keep track of electrons 

Rules for oxidation

1. Oxidation states must equal 0

2. All uncombined elements equal 0

3. Group 1=+1 Group 2=+2 Group 13=+3

4. H=+1 F=-1 O=-2

Oxidation

loss of electrons

Reductions 

gains electrons 

LEOGER

loss of electrons oxidation

Gain of electrons reduction

Reducing agent

substance oxidized

Oxidizing agent 

substance that is reduced