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Chemisrty

QuestionAnswer
What is needed to start a Chemical Reaction? Activation Energy
What is an Arrow? -->s are "yeilds" in an chemical formula or equation
What are some Charistics of an Chemical Reaction? changes in energy or changes in properties produce: Gas (bubbles form), color change, precipitate forms, and temperature changes.
Alter the chemical properties of matter; new substances with new properties are formed Chemical Changes
What is a shorter, easier way to show chemical reactions by using symbols instead of words? Chemical Equations
A number placed in front of a chemical formula in an equation. Tells how many atoms or molecules of each reactant and product take part in the reaction. Coeffient
What is the amount of matter involved in a chemical reaction that does not change. The total mass of the reactants must equal the total mass for the products. Conservation Mass
What are the controlling rates of Reaction? Concentration, temperature, surface area, catalysts, enzymes and inhibitors.
What is the amount of one material in a given amount of another material? Concentration
Temperature higher heat causes faster reactions
Surface area increased surface area= increased reaction
Catalysts materials that increases the rate of reaction
Enzymes biological catalysts
Inhibitors decreases the rate of a reaction
Decomposition Reaction a compound breaks down into simpler substances
Endothermic Reaction an observable change in energy that shows a chemical reaction took place; A reaction that takes heat from the solution
Exothermic Reaction an observable change in energy that shows a chemical reaction took place; a reaction that releases heat; gives off energy, makes it feel warmer; most chemical reactions are this type.
Physical Changes alter only the physical properties of matter; no new substances are formed. Can be a change in size, shape or color; change in phase( by increasing or decreasing temperature: solid, liquid or gas)
Precipitate a solid that forms from solution during a chemical reaction; observable change that shows a chemical reaction took place
Products the materials you have after a chemical reaction; written on the right side of the formula
Reactants the materials you have at the beginning of a chemical reaction; written on the left side of the formula
Replacement Reaction one art of a compund is displayed by an element or compound from another substance( also called displacement reaction)
States of Matter solid, liquid and gas
Subscripts show the number of atoms of an element in a molecule or the ratio of elements in a compound
Synthesis Reaction two substances combine to form a new compound ( also called composition reaction)
Created by: 150014668
 

 



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