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Factors Affecting Reaction Rates and Evidences of Chem. Reaction

Factors that affect reaction rates and evidences of chemical reaction
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Temperature
the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)
Catalyst
(chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected
Stirring
stirring increases the rate at which particles dissolve
concentration
describes how much solute is present in a solution compared to the amount of solvent
surface area
the extent of a 2-dimensional surface enclosed within a boundary
Formation of Gas
indicator of a change in the form of bubbles
Precipitate
A solid that forms and settles out of a liquid mixture
Change in color
clue that a chemical change has occurred
change in temperature
indicate that energy has been absorbed or released in a chemical reaction