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Published byPatience Manning Modified over 9 years ago
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Write skeleton equations from the following word equations AND balance them: ◦ In water, iron (III) chloride reacts with sodium hydroxide producing solid iron (III) hydroxide and sodium chloride
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Pg. 63
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When two elements combine to form one new compound 2 reactants single product ◦ Can be single elements or compounds A + B AB Ex. 2Na + Cl 2 2NaCl Ex. CaO + H 2 O Ca(OH) 2 Ex. 2SO 2 + O 2 2SO 3
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When one compound breaks down to form two new products Often require an energy source 1 reactant 2 products AB A + B Ex. 2NaN 3 2Na + 3N 2
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Oxygen combines with a substance (usually a organic compound also called hydrocarbons) to form water and CO 2 Ex. CH 4 + 2O 2 2H 2 O +CO 2 http://www.youtube.com/watch?v=LzagxjtZrJ Y http://www.youtube.com/watch?v=LzagxjtZrJ Y
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Atoms of one element replace the atoms of another element Not all metals react; use activity series list to predict reactivity A metal can replace a metal that is below it on the a.s. but not above it (same for halogens) AB + C CB +A Ex. 2Li + H 2 O 2LiOH + H 2
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An exchange of ions between two compounds AX + BY AY +BX Ex. 2NaOH + CuCl 2 2NaCl + Cu(OH) Most double replacement reactions result in the formation of a precipitate (a solid)
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A catalyst is something that is used to speed up a chemical reaction Can be heat, stirring, or another element or compound It is written above the yields arrow Use delta (Δ ) to represent heat Ex.
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C 3 H 8 + O 2 CO 2 + H 2 O Mg + Cl MgCl 2 ZnSO 4 + Mg MgSO 4 + Zn LiBr Li + Br FeCl 2 + MgS FeS + MgCl
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