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chemistry vocab

chemistry part two vocabulary

TermDefinition
activation energy what is needed to start a chemical reaction
arrow you read the arrow as yields in a chemical equation or formula
characteristics of a chemical reaction changes in energy or changes in properties produce gas or bubbles color change precipitate forms or temperature change
chemical change alter the chemical properties of matter; new substances with new properties are formed
chemical equation a shorter easier way to show chemical reactions by using symbols instead of words
coefficiant a number placed in front of a chemical formula in an equation. Tells how many atoms or molecules of each reactant must equal the total mass of the products
conservation of matter the amount of matter involved in a chemical reaction does not change. The total mass of the reactants must equal the total mass of products
controlling rates of reaction concentration temperature surface area catalysts enzymes and inhibitors
concentration amount of one material given amount of another material
temperature higher heat causes faster reactions
surface area increased surface area = increased reaction
catalysts materials that increase the rate of reaction
enzymes biological catalysts
inhibitors decreases the rate of 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 absorbs energy makes it feel cooler
physical change alter only the physical properties of matter no new substances are formed can be change in size shape or color change in phase by decreasing temperature solid liquid and 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 part of a compound is displaced by an element or compound from another substance also called displacement reaction
states of matter solid liquid and gas
subscripts shows the number 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: 150013305