11.1 Describing Chemical Reactions – Flashcards
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Equation
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A chemical reaction can be concisely represented by a chemical ____
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Reactions
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The substances that undergo a chemical change are the ___
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Products
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The new substances formed in a chemical reaction are the ____
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Mass
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In accordance with the law of conservation of __ , a chemical equation must be balanced
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coefficients
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when balancing an equation, you place ____ in front of reactants and products so that the same number of atoms of each element are on each side of the equation
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element
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you place coefficients in front of reactants and products so that the same number of atoms of each ___ are on each side of the equation
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subscripts
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An equation must never be balanced by changing the __ in the chemical formula of a substance
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(l)
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Symbol for liquid
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(s)
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symbol for solid
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(g)
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symbol for gas
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(aq)
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symbol for substance dissolved in water
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catalyst
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if a __ is used to increase the rate of a chemical reaction, its formula is written above the arrow
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ST
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in an equation, a substance is shown to be in the gaseous state by placing an upward-pointing arrow after its formula
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AT
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the symbol triangle placed over the arrow in an equation means that heat is supplied to the reaction
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NT
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atoms are destroyed in a chemical reaction
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ST
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a skeleton equation is not a balanced equation
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chemical equation
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symbolic way of describing a chemical reaction
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skeleton equation
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chemical equation that does not indicate the amounts of substances involved
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catalyst
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speeds up the rate of a reaction
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coefficients
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numbers used to balance a chemical equation
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balanced equation
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an equation in which each side has the same number of atoms of each element
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reactants
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substances that undergo chemical change
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products
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new substances formed in a chemical reaction
