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Chemical Reactions
Question | Answer |
---|---|
CxHy + O2 --> CO2 + H2O | combustion reaction |
AB --> A + B | decomposition reaction |
A + B --> AB | synthesis reaction |
AB + CD --> AD + CB | double replacement reaction |
AB + C --> CB + A | single replacement reaction |
starting material in a chemical reaction | reactants |
ending material in a chemical reaction | products |
speed up chemical reaction in non-living things | catalyst |
speed up chemical reaction in living organisms | enzyme |
means 2 atoms | diatomic |
coefficient | whole numbers added to balance a chemical equation |
subscript | small numbers NEVER changed to balance a chemical equation |
chemical equation that does not equal numbers of atoms ; unbalanced | skeleton equation |
states that mass is never created or destroyed, so #reactants = #products | law of conservation of mass |
P and As | tetratomic elements |
H, N, O, F, Cl , Br, I | diatomic elements |
S | octatomic element |
"list" that includes F as most reactive anion | halogen |
"list" that includes Li as most reaction cation | activity series of metals |
numbers NEVER EVER changed to balance equation ; gives starting number of atoms | subscripts |
numbers placed in front of atoms and compounds to balance equation | coefficients |