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From wetpaint
15
Chemistry
8th Grade
02/29/2012

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Term
Ionic bond
Definition
A chemical bond Made form bonds coming together
Term
What makes A mixture a solution?
Definition
A type of homogeneous mixture where the solute is dissolved into a solvent.
Term
Where can solutions be found?
Definition
Liquid solid and gas
Term
What are the parts of a solution?
Definition
There are 2 parts, the solute and the solvent:
Definitions:

The solute: the dissolved matter in a solution; the component of a solution that changes its state.

The solvent: a liquid substance capable of dissolving other substances.
The solvent does not change its state in forming a solution.
Term
What is a neutralization reaction?
Definition
A chemical reaction in which an acid and a base react to form a salt.
Term
Compare the characteristics of Acids. Bases, and Salts.
Definition
Acid:
Taste sour
Reach with certain metals (Zn, Fe, etc.) to produce hydrogen gas
cause certain organic dyes to change color
react with limestone (CaCO3) to produce carbon dioxide
React with bases to form salts and water

base:
Taste bitter
feel slippery or soapy
react with oils and grease
cause certain organic dyes to change color
react with acids to form salts and water
Salt:
Salt is NaCl (Last letter L not I). Sodium and chloride, combined in a chemical reaction. Salt is a compound (a mixture of two or more elements). We use salt every day, in cooking or on the side walk. Salt is in everything, even in candy.
Term
What makes a substance an acid? a base? a salt?
Definition
acid is an electron pair acceptor
Term
What are the parts of a chemical equation?
Definition
They are the reactant, yield sign, product and the coeffiecients
Term
Identify when a chemical reaction takes place.
Definition
Chemical reactions can be either spontaneous, requiring no input of energy, or non-spontaneous, typically following the input of some type of energy, such as heat, light or electricity
Term
What are the four signs of a chemical reaction?
Definition
1) color change
2) the formation of gas bubbles
3) formation of a precipitate
4) temperature change
Term
How is energy exchanged during a chemical reaction?
Definition
Through physical and chemical change
Term
What factors affect the rate of reaction?
Definition
Temperature, the mediums,and catalysts all affect the rate of chemical reaction.
Term
Recognize the basic characteristics of ionic and covalent bonds.
Definition
in ionic materials show strong attractions to other ions in their vicinity, atoms of covalent materials are bound tightly to each other in stable molecules.
Term
What happens to electrons during the bonding process
Definition
during the bonding process the valence electrons are shared between the two bonds
Term
What is a covalent bond?
Definition
a form of chemical bonding that is characterized by the sharing of pairs of electrons between atoms.
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