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Chemical Reactions

Published on Nov 19, 2015

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PRESENTATION OUTLINE

CHEMICAL REACTIONS

Photo by Haags Uitburo

MATTER

IS DESCRIBED BY ITS' PROPERTIES & HOW IT CHANGES
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CHANGES IN MATTER

ARE DESCRIBED IN TERMS OF PHYSICAL & CHEMICAL CHANGES
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CHEMICAL CHANGE

PRODUCES 1 OR MORE NEW SUBSTANCES; AKA CHEMICAL REACTIONS
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REACTANTS

SUBSTANCES THAT UNDERGO THE CHEMICAL CHANGE
Photo by Horia Varlan

PRODUCTS

THE NEW SUBSTANCE IN THE CHEMICAL REACTION
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HOW DO WE IDENTIFY A CHEMICAL REACTION?

BY THE CHANGES IN PROPERTIES & ENERGY THAT WE CAN OBSERVE
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3 WAYS TO IDENTIFY A CHEMICAL REACTION:

PRECIPITATE FORMED, GAS PRODUCTION, & COLOR CHANGE
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CHEMICAL EQUATIONS

CONTAINS THE CHEMICAL SYMBOL & SHOWS A CHEMICAL REACTION
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CHEMICAL EQUATIONS ALSO

TELL YOU THE SUBSTANCES YOU START WITH & WHAT'S FORMED AT THE END
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REACTANT + REACTANT--> PRODUCT + PRODUCT

THE LAW OF CONSERVATION OF MASS:

MATTER CANNOT BE CREATED OR DESTROYED!

BALANCING EQUATIONS

THE NUMBER OF REACTANTS WILL EQUAL THE NUMBER OF ITS' PRODUCTS
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3 TYPES OF CHEMICAL REACTIONS:

SYNTHESIS, DECOMPOSITION, & REPLACEMENT
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ACTIVATION ENERGY

MINIMUM ENERGY NEEDED TO START A CHEMICAL REACTION
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ALL CHEMICAL REACTIONS NEED ENERGY TO GET STARTED!!

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FACTORS THAT AFFECT THE RATE OF A CHEMICAL REACTION: SURFACE AREA,

TEMPERATURE, CONCENTRATION, & PRESENCE OF CATALYSTS/INHIBITORS
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CONCENTRATION

AMOUNT OF SUBSTANCE IN A GIVEN VOLUME
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CATALYST

SUBSTANCE THAT INCREASES THE ACTIVATION ENERGY

INHIBITOR

SUBSTANCE THAT SLOWS DOWN A CHEMICAL REACTION
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EXOTHERMIC REACTIONS

REACTION IN WHICH ENERGY IS RELEASED (LEAVES)

ENDOTHERMIC REACTION

REACTION IN WHICH ENERGY IS ABSORBED
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ACIDS & BASES, AND SOLUTIONS

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A MIXTURE IS CLASSIFIED AS A SOLUTION

BASED ON ITS' LARGEST PARTICLES

SOLUTION

MIXTURE CONTAINING A SOLVENT & AT LEAST 1 SOLUTE

A SOLUTION HAS THE SAME PROPERTIES THROUGHOUT IT!

SOLUTE

SUBSTANCE DISSOLVED BY THE SOLVENT

SOLVENT

PART OF SOLUTION USUALLY PRESENT IN THE LARGEST AMOUNT

COLLOID

MIXTURE CONTAINING SMALL, UNDISSOLVED PARTICLES

SUSPENSION

MIXTURE WHERE PARTICLES ARE EASILY SEEN & SEPERATED
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A SOLUTION IS FORMED WHEN PARTICLES OF A SOLUTE

SEPARATE FROM ONE ANOTHER & ARE SURROUNDED BY THE SOLVENT
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CONCENTRATIONS OF SOLUTIONS CAN BE CHANGED BY ADDING SOLUTE,

OR ADDING/REMOVING SOLVENT.

FACTORS THAT CAN AFFECT SOLUBILITY OF A SUBSTANCE:

PRESSURE, TYPE OF SOLVENT, & TEMPERATURE
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SOLUBILITY

MEASURE OF HOW MUCH SOLUTE CAN DISSOLVE IN A SOLVENT AT A GIVEN TEMP.

AN ACID REACTS WITH METALS & CARBONATES,

TASTES SOUR, & TURNS BLUE LITMUS PAPER RED.
Photo by maticulous

A BASE TASTES BITTER,

FEELS SLIPPERY, & TURNS RED LITMUS PAPER BLUE.

AN ACID PRODUCES HYDROGEN IONS (H+) IN WATER

Photo by EMSL

A BASE PRODUCES HYDROXIDE IONS (OH-) IN WATER.

Photo by Mycael

NEUTRALIZATION

A REACTION BETWEEN AN ACID & BASE

A SALT IN ANY IONIC COMPOUND

IS FORMED BY THE POSITIVE ION OF THE BASE & NEGATIVE ION OF THE ACID
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IN A NEUTRALIZATION REACTION,

AN ACID REACTS WITH A BASE TO PRODUCE A SALT & WATER
Photo by kevin dooley