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Chem 09 Reactions

Terms/symbols related to chemical equations.

E.C.P.I.G.: 5 evidences of chemical change C.olor change, G.as produced, E.nergy changes (in/out), P.recipitate forms, relatively I.rreversible
starting substance ("old") in a chemical change/reaction reactant
substance formed ("new") by a chemical change/reaction product
law of conservation of mass (chemical equation format) mass of reactants = mass of products
symbolic representation of a specific chemical change/reaction chemical equation
abbreviation for an element (ex: iron, calcium, neon) symbol (ex: Fe, Ca, Ne)
abbreviation for a compound (ex: water, sodium chloride) chemical formula (H2O, NaCl)
symbol that, when on left side of the "--->" in a chemical equation, means "reacts with" +
symbol in a chemical equation that means "forms" or "produces" ---->
symbol in a chemical equation that means "yields when heated" --∆-->
symbol in a chemical equation that means "yields when electric current is applied" --elec-->
symbol in a chemical equation that means "yields in presence of a Pt (or other) catalyst" --Pt-->
substance that speeds up a chemical reaction without itself being used up catalyst
abbreviations used to show a reactant/product is a solid, liquid, or gas (s), (l), (g)
abbreviations used to show a reactant/product is dissolved in water (aq)
describes solution formed when a substance is 'dissolved in water' aqueous
describes a substance that can dissolve (in water) soluble
describes a substance that cannot dissolve (in water) insoluble
7 diatomic elements that always get a subscript of "2" when uncombined Br, I, N, Cl, H, O, F
describes a chemical equation that satisfies the law of conservation of mass (same # and kinds of atoms on both sides ––––>") balanced
numbers adjusted to balance a chemical equation coefficients
Reaction Type: element + element --> composition (synthesis)
Reaction Type: compound --> decomposition
Reaction Type: element + compound --> different element + different compound single replacement (or displacement)
Reaction Type: compound + compound --> different compound + different compound double replacement (or exchange)
Reaction Type: hydrocarbon + oxgen --> carbon dioxide + water combustion
The two products of the complete combustion of a hydrocarbon are... carbon dioxide & water
Describes any chemical change/reaction that PRODUCES energy exothermic
Describes any chemical change/reaction that ABSORBS energy endothermic
Metal elements arranged in order of decreasing reactivity activity series
Most chemically reactive halogen fluorine
Two products of the decomposition of a metallic carbonate: metallic oxide & carbon dioxide
Two products of the decomposition of a metallic chlorate: metallic chloride & oxygen
Two products of the decomposition of a metallic hydroxide: metallic oxide & water
Gas released when a reactive metal is placed in water (or if some less active metals are placed in hot water/steam) hydrogen
Another name for a decomposition reaction that is accomplished by using electricity electrolysis
Symbol for a chemical reaction that does not occur -X->
Symbol for a reversible reaction (best I can do on this site anyway) <==>
Double replacement reaction between HX and AOH --> AX + HOH (or H2O) neutralization (acid + base)
3 possible driving forces behind a double replacement reaction forms: 1)precipitate ('back door') OR 2)insoluble gas ('front door') or 3)water or other molecule ('keep dancing')
shows a double replacement reaction in which all the soluble reactants and products are shown as dissociated, hydrated ions COMPLETE ionic equation
shows only the ionic species in a double replacement reaction that undergo chemical change NET ionic equation
describes the ionic species in a double replacement reaction that remain unchanged throughout (i.e. start and end dissolved in water) spectator ions
term for the separation of ionic compound into individual ions which it dissolves dissociation
describes an ion in aqueous solution surrounded by water molecules hydrated ('solvated' if the solvent is not water)
which of the 5 reaction types is most often an endothermic process decomposition
group of organic molecules of which methane is a member and having the general formula CxH2x+2 alkanes
charge of the ions formed by elements in groups 1, 2, 13, 15, 16, 17 1+, 2+, 3+, 3-, 2-, 1-
charge of a cation + (positive)
charge of an anion - (negative)
overall charge of any compound (ionic or covalent) 0 (zero/neutral)
when balancing combustion reactions, AFTER moving the H subscript on the left over as the H coefficient on the right... the order the 3 elements are balanced H (always takes a '2'), C, O (save to last since in TWO places on right)
what 2 quantities do all balanced chemical equations conserve? mass and atoms
quantity conserved when the sum of the coefficients on each side of a balanced equation are equal (mass and atoms and...) moles/# of particles
if an equation conserved # of moles, what must be true if 'volume' is conserved also? all reactants and products are gases AND pressure/temperature are the same at the end as what they were at the beginning of the reaction
Created by: goakley