Chemistry Multiple Intellegences 2

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Works Cited

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Unit 2: Chemical Reactions

Neutralization

Acids and bases can be added together to create a substance with a ph closer to 7

Acids

Substances with ph levels below 7

Chemical property: characteristic when a substance reacts

Spectator Ions: ions that appear on both sides of of a chemical equation but don't actually do anything.

One way to tell when a chemical reaction occurs, is when a precipitate forms. A precipitate is a solid forms in a liquid. This means the substance is insoluble.

When a substance is insoluble, it makes it easier to predict if substances will react.

Reactions can be shown in 2 ways:

Chemical equations: 2K + Cl2 = 2KCl

Chemical equations need to be balances to have the same number of molecules on either side of the equal sign

For example K + Cl2 = KCl becomes 2K + Cl2 = 2KCl to match the number of chlorine atoms in the first part of the equation(there are two because Chlorine is diatomic and will always be found in pairs when not part of a compound).

Word Equations: Sodium + chlorine = sodium chloride

A reaction that results in 1 or more new substances is considered a chemical reaction

In a chemical reaction atoms are neither created nor destroyed, just simply re arranged

corrosion

bleaching ability

flammability

Reaction with acids or bases

Bases

Substances with ph levels above 7

Types of reactions:

Double Displacement

two compounds react to form two different compounds

Single Displacement

In order to replace another element in a compound, the element trying to replace it will have to be higher on the activity series of metals in reactivity. The same thing can be said about halogens replacing halogens

an element and compound react and the element replaces one element in the compound

Decomposition

One substance breaks apart into a fewer amount of substances

Combination

Two or more substances to make a lesser number of substances

Physical Property: characteristic of substance

if no new substance is created a reaction is considered to be a physical reaction

state

melting point

solubility

smell

density

Texture

Color