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Chemistry I 2nd Semester Exam
Second semester exam stuff.
83
Chemistry
11th Grade
05/21/2013

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Term
Covalent Bonds
Definition
Electrons shared between nonmentals
Term
Ionic Bonds
Definition
Electrons transferred between a metal and a nonmental
Term
Properties of covalent bonds
Definition
Low boiling and melting points
poor electricity conductors
powdery solids
composed of molecules
exist as solids, liquids, and gases
Term
VSEPR Theory letters represent:
Definition
Valence Shell Electron Pair Repulsion
Term
VSEPR Theory definition
Definition
Molecules get their shape from the repulsion (or lack of) from unshared electrons
Term
Linear Molecule shape
Definition
Two atoms bonded with each other. No shared electrons.
Term
Trigonal Planar
Definition
Three atoms bonded to one central atom with no unshared electrons. The central atom is usually Boron.
Term
Bent
Definition
Two atoms bonded to one central atom with unshared electrons. Central atom in the Oxygen group.
Term
Tetrahedral
Definition
Four atoms bonded to one central atom with no unshared electrons. Central atom in the Carbon group
Term
Pyramidal
Definition
Three atoms bonded to one central atom with unshared electrons. Central atom in the Nitrogen group.
Term
Trigonal Planar
Definition
Three atoms bonded to one central atom with no unshared electrons. Central atom usually Boron.
Term
Trigonal Bipyramidal
Definition
Five atoms bonded to one central atom with no unshared electrons. Central atom in the Nitrogen group
Term
Octahedral
Definition
Six atoms bonded to a central atom with no unshared electrons; Central atom in the Oxygen group.
Term
Law of Conservation of Mass
Definition
In a chemical reaction, matter cannot be created or destroyed
Term
How do you calculate Molarity?
Definition
Moles of solute over liters of solution
Term
How do you calculate the percent by mass?
Definition
The grams of the substance over the total amount of substance + other things multiplied by 100
Term
Moles of A to Moles of B
Definition
Moles of A x Moles of B
___________ ___________
1 Moles of A in problem
Term
Moles of A to Particles of A
Definition
AVOGADRO'S NUMBER NEEDED
Moles of A x Avo's Num; both over 1
Term
Particles of A to Moles of A
Definition
Particles of A x 1
_______________ _________
1 Avo's Num
Term
Grams of A to Grams of B (these are the long ones)
Definition
Grams of A x Moles of A x Moles of B x MM
___________ ____________ ____________
1 MM of A Moles of A
Term
Moles of A to Grams of A
Definition
Moles of A x MM of A both over 1
Term
Grams of A to Moles of A
Definition
Grams of A x 1 mol of whatever
___________ __________________
1 Molar mass of A
Term
Polar Bond
Definition
A covalent bond in which electrons are shared unequally
Term
Nonpolar Bond
Definition
A covalent bond in which electrons are shared equally
Term
Polar molecule
Definition
Unequal distribution of electrons in a molecule
Term
Nonpolar molecule
Definition
Equal distribution of electrons in a molecule
Term
Solution
Definition
A homogeneous mixture of two or more substances uniformly dispersed throughout a single phase
Term
Two parts of a solution
Definition
Solute + Solvent
Term
Solute's being dissolved, solvent's doing the dissolving
Definition
Difference between solute + solvent
Term
Colloid
Definition
Mixture with tiny particles and do not settle
Term
Suspension
Definition
Mixture with large particles dispersed evenly; settles.
Term
Concentration
Definition
Amount of a substance in a given quantity of solution
Term
Molarity
Definition
Moles of solute dissolves in liters of solution
Term
Saturated Solution
Definition
A solution that can hold no more solute
Term
Unsaturated solution
Definition
A solution that can hold more solute
Term
Supersaturated solution
Definition
A solution that is under certain conditions and can hold more solute than normal
Term
Electrolyte
Definition
A substance that, when dissolved in water, lets that liquid produce electricity
Term
Nonelectrolyte
Definition
A liquid that can't conduct electricity
Term
Colligative Property
Definition
A physical effect of the solute on the solvent
Term
Emulsion
Definition
A mixture of two or more immiscible liquids.
Term
Limiting Reactant
Definition
Reactant that limits the outcome
Term
Excess reactant
Definition
Reactant left over after reaction
Term
Theoretical yield
Definition
amount estimated to come out as the product
Term
Percent Yield
Definition
Actual over theoretical x 100
Term
THEORETICAL YIELD PROBLEMS FOLLOW
Definition
Grams of A to Moles of A
Term
Volume
Definition
Space occupied by matter. Volume of gas = volume of container
Term
Moles
Definition
Amount of particles in gas sample. 6.02x10^23 A's C.
Term
Temperature
Definition
Measure of average kinetic energy - Kelvin: C + 273
Term
Pressure
Definition
Force per unit area
Term
What increases pressure exerted by gas?
Definition
Increasing the number of gas particles.
Term
What decreases pressure exerted by gas?
Definition
Decreasing the amount of gas particles.
Term
What increases the pressure of gas in a container?
Definition
Reducing the size of the container
Term
What decreases gas' pressure in a container?
Definition
Increasing the size of the container
Term
What increases pressure of the gas involving temperature?
Definition
Heating it
Term
What decreases pressure of a gas involving temperature?
Definition
Cooling it
Term
Gases _____ when compressed.
Definition
Liquefy
Term
Boyle's Law
Definition
P1V1 P2V2
Term
Charles' Law
Definition
V1 = V2
__ __
T1 T2
Term
Gay-Lussac's
Definition
P1=P2
__ __
T1 T2
Term
Avogadro's Principle
Definition
Equal volumes of gases at the same temperature and pressure contain equal numbers of particles.
Term
Combined gas law
Definition
P1V1=P2V2
____ ____
T1 T2
Term
Ideal Gas Law; universal gas constant
Definition
PV=nRT; .0821 Liters x ATM/Mol x K
Term
Alkanes
Definition
Single bonds between carbons
Term
Alkenes
Definition
Double bonds between carbons
Term
Alkynes
Definition
Triple bonds between carbons
Term
Meth, Eth, Prop, But, Pent, Hex, Hept, Oct, Non, Dec
Definition
Ten prefixes for hydrocarbons
Term
Hydrocarbons
Definition
Simplest organic molecules composed of carbon and hydrogen only
Term
Alcohol
Definition
R-OH
Term
Ether
Definition
R-O-R
Term
Aldehyde
Definition
R-C-H
=O
Term
Ketone
Definition
R-C-R
=O
Term
Carboxylic Acid
Definition
R-C-OH
=O
Term
Ester
Definition
R-C-O-R
=O
Term
Amine
Definition
R-NH2
Term
Polymers
Definition
Large molecules consisting of many repeating subunits
Term
Monomers
Definition
Individual subunits of polymers
Term
Polyethylene's monomer
Definition
Ethylene
Term
Polyvinyl Chloride's monomer
Definition
Vinyl Chloride
Term
Polytetrafluoroethylene's monomer
Definition
Tetrafluoroethylene
Term
Polystyrene's monomer
Definition
Styrene
Term
Carbohydrates' monomer
Definition
Monosaccharides
Term
Proteins' monomer
Definition
Amino Acids
Term
Nucleic Acids' monomer
Definition
Nucleotides
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