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Chem Final Semester 2
Based mainly on definitions
37
Chemistry
10th Grade
06/10/2010

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Cards

Term
What is the SI base unit used to measure the amount of a substance?
Definition
the Mole
Term
What is Avagadro's Number? (Def. and #)
Definition
Volume of one mole of gas which is (to 3 sig figs) 6.02 X 1023
Term
What is the percent by mass of each element in a compound called?
Definition
Percent Composition
Term

What is the formula with the smallest whole number mole ratio of element?

What is the formula that specified the actual number of atoms of each element in one molecule or formula unit of the substance?

Definition

1) Empirical Formula

2) Molecular Formula

Term
What is a compound that has a specific number of water molecules bound to its atoms?
Definition
Hydrate
Term
What does the kinetic molecular theory state?
Definition
Behavior of gases in terms of particles in motion
Term
What is an intramolecular force? An intermolecular one?
Definition

1) Forces such as covalent, ionic, and/or metallic bonding

2) Like things (elements) bonding with each other

Term
What is vaporization?
Definition
Liquid changing to a gas.
Term
What is evaporation?
Definition
Vaporization that occurs only at the surface of a liquid.
Term
What is sublimation?
Definition
Solid going directly to a gas.
Term
What is condensation?
Definition
Gas changing to a liquid.
Term
What is molar volume?
Definition
Volume that one mole occupied at 0.00 degrees Celsius and 1.00 atm pressure.
Term
What refers to the maximum amount of solute that will dissolve in a given amound of solvent at a specific temp. and pressure?
Definition
Solubility
Term

What does soluble mean?

Insoluble is the opposite.

Definition
A substance that dissolved in a solvent.
Term
What is solvation?
Definition
Surrounding solute particles with solvent particles to form a solution (hmmm.... putting a solvent with a solute)
Term

What's a saturated solution?

Unsaturated?

Supersaturated?

Definition

1) maximum amount of dissolved solute for a giveb amount of solvent

2) less dissolved solute than a saturated

3) more dissolved solute than a saturated solution

 

 

*same temperature/pressure

Term
What term is used to represent the number of moles of solute dissolved per liter of solution?
Definition
Molarity
Term
What is the ratio of the number of moles of solute dissolved into one kilogran of solvent?
Definition
Molality
Term
What is the ratio of the number of moles of solute in solution to the total number of moles of solute and solvent?
Definition
Mole Fraction
Term
What is the definition of colligative properties?
Definition
Physical properties of solutions affected by the number of particles, not the nature.
Term
What is energy? (funny definition)
Definition
The ability to do work or produce heat.
Term

What is potential energy?

What is kinetic energy?

Definition

1) Energy stored inside

2) Energy released

Term
What is heat?
Definition
Energy that is in the process of flowing from a warmer object to a cooler object.
Term
What is a calorie?
Definition
The amount of heat required to raise the temperature of one gram of pure water by one degree Celsius.
Term
What is a joule?
Definition
SI unit of heat and energy
Term
What is specific heat?
Definition
Amount of heat required to raise the temperature of one gram of that substance by one degree.
Term
What is the heat content of a system at a constant pressure?
Definition
Enthalpy
Term
What is the collision theory?
Definition
Atoms, ions, and molecules must collide in order to react.
Term
What is a temporary, unstable arrangement of atoms that may form products or break apart to re-form the reactants called?
Definition
Activated complex
Term
What is the activated energy?
Definition
Minimum amount of energy needed to start a chemical reaction.
Term

What is a catalyst?

An inhibitor?

Definition

1) Substance that speeds up a reaction (lowers activation energy)

2) Substance that slows down a reaction (raises activation energy)

Term
What is a reversible reaction?
Definition
One that can occur in both the forward and reverse directions.
Term
What is chemical equilibrium?
Definition
A state in which the forward and reverse reactions balance each other because they take place at equal rates.
Term
Which principle states that if stress is applied to an equilibrium, the system will shift in order to relieve the stress?
Definition
Le Chatelier's Principle
Term

What is pH?

What is pOH?

Definition

1) negative logarithm of the hydrogen ion concentration

2) negative logarithm of the hydroxide ion concentration

Term
What is a half-reaction?
Definition
Either the oxidation half alone or the reduction half alone of a redox reaction.
Term
Which compounds are the simplest organic compounds that contain only carbon and hydrogen elements?
Definition
Hydrocarbons
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