REGENTS & HONORS CHEMISTRY
TEST #4
KEY TERMS AND IMPORTANT STUFF TO KNOW
Combining Matter, Physical Changes & Chemical Reactions
Combining Matter Physically
Mixtures
Heterogeneous vs. Homogeneous
Ways to Separate Mixtures
Filtration, Distillation, Evaporation,
Chromatography, Crystallization
Dissolving & Solution Formation
Solutions = Homogeneous mixtures
Ways to separate solutions
Factors Affecting Rate of Dissolving
Temp, Stirring, Surface area
Factors Affecting Solubility
Nature of Solute/Solvent (they must attract)
Polars dissolve in Polar Solvents
Nonpolars dissolve in Nonpolar Solvents
Ionics dissolve in Polar Solvents
Temperature
Pressure (gases only)
Gas Solubility
Best at high pressure low temp
Using the Solubility Curves (Table G)
Predict Solubility at different temp
How much more you can add if ∆T
How much will precipitate out if ∆T
Describe Solution
Saturated, Unsaturated, Supersaturated
Properties of Matter
Phys. Properties of Matter
Can be observed without changing identity
Ex: Density, color, solubility, conductivity,
Chemical Properties of Matter
Can be observed when matter is reacting
Ex: Rusting, burning etc…
Recognizing Physical vs. Chemical Changes
Physical Change: formula doesn’t change
Ex: boiling, melting, dissolving etc…
Chemical Change: reaction occurs, bonds break
and form, get new products
Chemical Reactions & Equations
Writing Chemical Equations
Balancing Equations with Coefficients
Law of Conservation of Matter
Energy in Chemical Reactions
Endothermic vs. Exothermic Reactions
Identify Types of Equations
Combustion
Synthesis (Direct Combination)
Decomposition (Analysis)
Single Replacement
Double Replacement
Complete a D.R. Reaction
Identifying Precipitate (Table F)
HONORS ONLY
Predicting Products of Reactions
Synthesis, Decomposition
Single Replacement (use activity series TABLE J to predict if reaction will occur)
Double Replacement: Writing Ionic Equations, Net Ionic Equations, Identifying Spectator Ions
TEXTBOOK:
Honors: Chap. 4, 9
Regents: Chap. 2, 3 (density), 8
UPCO: Chap. 3 (types of reactions & balancing), 5 (mixtures)