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34 Cards in this Set
- Front
- Back
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Chemical Change
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substance converted into new substance
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Chemical Reaction
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Involves chemical change. bonds broken and new bonds formed
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Chemical equation
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Materials and products needed to form chemical reaction
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Equation
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Reactants to Left of arrow
Products to Right of arrow |
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Balanced Equation
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Equal number of atoms in reactant and product
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Steps to balance equation
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1. Write equation
2. Count atoms of each element 3. Balance with coefficients 4. Check answer to confirm balance |
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Combination Reaction
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2 or more elements bond to form one product
Atoms are rearranged |
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Decomposition Reaction
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Reactant splits into 2 or more simpler products
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Single Replacement Reaction
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Reactants switch places in other reacting compound
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Double replacement Reaction
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Positive ions in reactant switch places
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Oxidation
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Loss of electrons. Electron donation to produce a more positive ion.
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Reduction
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Gain of Electron. Electron acceptance to produce a more negative ion.
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REDOX
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Reduction-Oxidation Reaction
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Atoms of Metals
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Oxidize--"lose to gain"
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Atoms of Nonmetals
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Reduce--"gain to be negative"
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Metals from positive to neutral
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Gain Electrons--Reduction
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Nonmetals from negative to neutral
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Lose Electrons--Oxidation
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Ionic Compound
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Metals are oxidized
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avagadro's Number
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6.02X10^23=1 Mole
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Mole of an element
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6.02X10^23 atoms of that element
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1 Gm
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1 mole of AMU
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Molar Mass
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Number of grams equal to atomic mass of that element
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Law of Conservation of Mass
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No material lost or gained in chemical reaction. No change in total mass of substances.
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Actual Yield
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Amount of product when reaction ends
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Theoretical Yield
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Expected yielded product
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Percent Yield
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actual yield
__________ X 100% theoretical yield |
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Limiting Reactant
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Reactant completely used up
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Excess Reactant
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Left over
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Heat of Reaction
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Amt heat absorbed/released during reaction at constant pressure
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Endothermic Reaction
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Heat absorbed. Reactant side.
Sign is positive |
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Exothermic Reaction
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Heat released. Product side. Negative
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Activation Energy
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Energy needed to break bonds of reacting molecules
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Coefficients
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Whole numbers placed in front of formlas to balance
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Formula Unit
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group of ions in an ionic compound
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