Unit 4 Flashcards
(25 cards)
Physical Change
Alters the INTERMOLECULAR forces; substance is not changed.
Chemical Change
Alters the INTRAMOLECULAR forces; substance is changed
Synthesis/Combination Reactions
From A and B to AB
Decomposition Reactions
From AB to A and B
Single Replacement
M + RS to MS + R –OR– Q2 + RS to RQ + S2
-If the element by itself on the left is higher on the activity series than the corresponding element in the RS, then replace it. If not there is no reaction.
Combustion
CxHyOz + O2 make CO2 + H2O
No Precipitation (Double Replacement)
No Reaction
Molecular Equation
Complete, neutral formulas for every compound in reaction shown.
Complete Ionic Equation
All species as they are actually present shown
Spectator Ions
Unchanged on both sides of reaction
Net Ionic Equation
Only the species that change shown. No Spectator Ions.
non-metal oxide and water react (synthesis)
Acid is made
non-metal oxide and a metal oxide reaction (synthesis)
Salt is made
metal oxide reacts with water (Synthesis)
Base is made
Activity Series for Metals
For metals, the most reactive are typically group 1 and it decreases the further left on the periodic table. Na and H the exceptions.
Activity Series for Non-Metals
Increases as one moves up the group. Fluorine has the greatest reactivity
Both Reactants are Ionic Compounds
Double Replacement
Acid + Base reactants (DR)
Salt and Water products
Two aqeuous solutions for Reactants (DR)
Product is Gaseous
gas-evolution reactants
Sulfides, Carbonates and bicarbonates, Sulfites and bisulfides, and Ammonium.
Complete combustion
Excess oxygen, CO2 product
Incomplete combustion
Limited oxygen, CO product
Net Ionic equation if all species are spectating
No Reaction, No precipitate
Oxidation
Loss of Electrons, increase in charge
