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Chemistry Ch.5 Vocab

On chemical reactions

Physical Properties Characteristics that are observed or measured w/o changing composition
Extensive Property Phys. prop. that is dep. upon the amount or substances present(volume, mass, length)
Intensive Property Phys. Prop indep. upon amount present(density,melt. pt., boil pt.)
Physical Change Change in substance resulting in dif. appear. but not in chem comp.(breaking a crystal)
Chem Change/Reaction process that involves 1 or more substances changing into new subs(words that describe, decay,grow ripen)
What does chem reaction involve? rearrangement of atoms
Reactants starting substances on the left of equation
Products Subs formed during reaction on right of equation
Law of conservation and matter in chem reaction atoms are neither created nor desroyed
Synthesis Reaction involves 2 or more subs reacting to form a single compound A+B-->AB
Decomposition Reaction reverse of synth reaction; reaction in which a compound breaks down into 2 or more subs ex: AB-->A+B
Combustion Reaction when sub reacts w/ Oxygen to produce energy in the form of heat and light
Single Replacement/Displacement reaction where one element takes the place of another element in a compound ex: AX+BX-->AX+B
Double Replacement Reaction is an exchange of ions between 2 compound which produces a precipitate(solid produced during reaction) a gas or water ex: AX+BY-->AY+BX
Precipitation Reaction formation of a solid
Dissociate/Seperate When an ionic compound dissolves in water and move around indep. making a solution a good conductor if electric
Strong electrolyte sub that dissolves in h20 by dissociating completely into ins
Soluble Solid readily dissolves in water
Insoluble Solid slightly dissolves into water to a very insignificant degree
Molecular Equations show complete undisociated forms of all reactants and products
Complete ionic equation denotes all strong electrolytes as ions
spectator ions ions that don't participate in a reaction; are not present
Acid tastes sour- fruit
Base Slippery- soap
Arrhenius Acid produces H+ ions (protons) when dissolved in water
Arrhenius Base sub that pro hydroxide ions(OH-) when dissolves in H2O
What do acid-base reactions form? Water
Reducing Agent/ Oxidizing Agent OA- sub that's reduced RA-sub that is oxidized
Oxidation Number method technique for balancing red-ox equations based on total increase in oxidation numbers resulting from oxidation must = the total decrease in oxidation numbers resulting from reduction
Created by: Lily J