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Chem 09 Reactions
Terms/symbols related to chemical equations.
| Term | Definition |
|---|---|
| mnemonic for 5 evidences of chemical change... do you know what the evidences are??? | ECPIG |
| 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 | equals |
| symbolic representation of a specific chemical change/reaction | equation |
| abbreviation for an element | symbol |
| abbreviation for a compound | formula |
| symbol that, when on left side of the "--->" in a chemical equation, means "reacts with" | + |
| meaning of --> symbol in a chemical equation... there are several but just one is shown here | produces |
| -∆-> symbol in a chemical equation that means "reacts when _?_" | heated |
| --elec--> symbol in a chemical equation means "_?_ reaction" | electrolysis |
| --Pt--> symbol in a chemical equation that means "Pt (or whatever symbol/formula is written there) is a _?_" | catalyst |
| substance that speeds up a chemical reaction without itself being used up | catalyst |
| abbreviation used to show a reactant/product is a solid | (s) |
| abbreviation 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 |
| BrINClHOF or H7 is a mnemonic to remind you of the _?_ elements that always get a subscript of "2" when UNCOMBINED | diatomic |
| 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 --> | synthesis |
| Reaction Type: compound --> | decomposition |
| Reaction Type: element + compound --> different element + different compound | single replacement |
| Reaction Type: compound + compound --> different compound + different compound | double replacement |
| Reaction Type: hydrocarbon + oxgen --> carbon dioxide + water | combustion |
| The two products of the complete combustion of a hydrocarbon are always carbon dioxide and _?_ | 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 form and _?_ series | activity |
| Most chemically reactive halogen | fluorine |
| Gas released when a reactive metal is placed in water (or if some less active metals are placed in hot water/steam) | hydrogen |
| of the 5 reaction types, the one which always requires an addition of energy in some form (always endothermic) | decomposition |
| group of organic molecules of which methane is a member and having the general formula CxH2x+2 | alkanes |
| the first move in balancing a combustion reactions is to move the subscript of _?_ on the left over as the coefficient of that same element on the right | hydrogen |
| abbreviation used to show a reactant/product is a liquid | (l) |
| abbreviation used to show a reactant/product is a gas | (g) |
Created by:
goakley
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