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21 Cards in this Set
- Front
- Back
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A change in matter in which a substance changes form but not identity
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Physical Change
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A change in matter that results in the formation of a new substance or substances with new properties
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Chemical Change
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Matter can be neither created nor destroyed in physical and chemical changes
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Law of Conservation of Mass
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What can you change to balance chemical equations?
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Coefficients
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The numbers in front of the chemical formulas of the reactants and products. They show the correct ratio in which the reactants combine to form the products
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Coefficients
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In order for matter to be conserved, the number of atoms on both sides of a chemical equation must be __________________
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Equal
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Several reactants combine to form a single product
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Combination Reaction
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A compound breaks down as a result of the chemical change.
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Decomposition Reaction
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A compound breaks apart, and one part combines with the other reactant—either an atom or a group of atoms
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Single Exchange Reaction
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Both reactants break apart. Their parts then recombine into two new products. Thus, the two reactants exchange parts
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Double Exchange Reaction
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A + B → AB
2Fe (s) + O₂(g) → 2FeO (s) |
Combination Reaction
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AB → A + B
2NaF (s) → 2Na (s) + F₂(g) |
Decomposition Reaction
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A + BC → AC + B
Zn (s) + HCl (aq) → ZnCl (aq)+ H₂(g) |
Single Exchange Reaction
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AB + CD → AD + CB
AgNO₃(aq) + NaCl (aq) → NaNO₃(aq) + AgCl (s) |
Double Exchange Reaction
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Physical or Chemical Change?
NH₃(g) → NH₃(l) |
Physical Change
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Physical or Chemical Change?
N₂(g) + 3 H₂(g) → 2 NH₃(g) |
Chemical Change
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Physical or Chemical Change?
Dissovling salt in water. |
Physical Change
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Physical or Chemical Change?
Rusting |
Chemical Change
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Physical or Chemical Change?
Sanding wood |
Physical change
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Physical or Chemical Change?
CO₂(s) → CO₂(g) |
Physical Change
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Physical or Chemical Change?
BaCl₂(aq) + 2Na(OH) (aq) → 2NaCl (aq) + Ba(OH)₂(s) |
Chemical Change
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