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Published byHelena Simpson Modified over 9 years ago
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10/05/2015
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Please write down these vocabulary words (if you have not done so yet) and define them from discovery education Product Limiting Reactant Reactant Excess Reactant Coefficient Chemical Equation Synthesis Decomposition Combustion Single Replacement Double Replacement
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Review: Subscripts The specific number of atoms Superscripts charges on ions Coefficients Number of Molecules present in a chemical formula
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Chemical Reactions: Cause atoms of the same or different elements to rearrange to form a new substance or substances
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Predicting the reactions that occur when two substances are put together Product- the substances that are formed during a chemical reactions Arrows point toward the product Reactant- the substances present before a chemical reaction occurs Arrow points away from the reactants
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Limiting Reactant - The reactant in a chemical reaction that limits the amount of product that can be formed. The reaction will stop when all of the limiting reactant is consumed. Excess Reactant - The reactant in a chemical reaction that remains when a reaction stops when the limiting reactant is completely consumed. The excess reactant remains because there is nothing with which it can react.
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SymbolsMeaning (s)Solid (l)Liquid (g)Gas (aq)In aqueous solution (dissolve d in water) SymbolMeaning “produces” or “yields” indicating result of reaction Reaction in which products can reform into reactants; final result is a mixture of products and reactants
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1) Synthesis 2) Decomposition 3) Combustion 4) Single Replacement 5) Double Replacement
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Synthesis- “Love at first sight” Decomposition- “The big break-up” Single Replacement- “My best friends girlfriend” Double Replacement- “Revenge” Combustion- “The player”
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Hey Harry Hey Sally Basic equation: A+B AB
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The compound produced is larger and more complex than the reactants Example: CO 2 + 6 H 2 O C 6 H 12 O 6 + 6 O 2
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But, baby I love you We are Through Basic Equation: AB A+B
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The Breakdown of a larger compoundThe Breakdown of a larger compound Example: 2 H 2 O 2 H 2 + O 2 I am so over you
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Hey, How you doing? Oh Pierre! Mark Im leaving you Basic Eqn: AB + C BC + A This Stinks!
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“Free” element must be the more reactive element for a reaction to occur ( Pierre is more suave then Mark) Example: 2 K + 2 HCl 2KCl + H 2
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Basic Eqn: AB + CD AD + BC Pierre, Im sick of you Chloe was my one true love, but Marks girl is looking pretty Hot. I have to get Pierre back. Hey Chloe do you want to go out Ok I can’t believe Chloe would do that
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Always involves the formation of a molecular compound such as water (Tears) and either a precipitate or a gas Ex: 2 KI (aq) + Pb(NO 3 ) 2(aq) PbI 2(s) + 2 KNO 3(aq)
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Basic Eqn: AB + O AO + BO Ashley you’re my BFF Hey Ladies (3 weeks later) That was a great date Baby, I love you
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Produce oxide compounds and energy (very exothermic) Ex: CH 4 + 2O 2 CO 2 + 2H 2 O + ENERGY Honey, Why is Ashley’s number on your phone?
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