Equations & Reaction Word Scramble
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| Question | Answer |
| Chemical Reaction | Occurs when one or more substances change or recombine in new ways to form new substances |
| Reactants | The starting materials in a chemical reaction (on the left side of the arrow) |
| Products | The substances that are the result of the change in the chemical reaction (show up on the right side of the arrow) |
| Signs of a chemical change | Formation of a solid precipitate, temperature change, color change, or formation of gas |
| Law of Conservation of Matter and Energy | Reactions must converve matter (mass and charge), and energy. Conserve EVERYTHING! |
| Chemical Equation | Using symbols and numbers to represent the changes that occur during a chemical reaction |
| Coefficients | Big numbers put in front of chemical formulas to balance an equation. |
| Synthesis (direct combination) | combine 2 or more reactants to make a bigger product |
| Decomposition | break down a big reactant into smaller chemicals |
| Single Replacement | One element is kicked out of a compound and replaced by another. |
| Double Replacement | Two compounds break apart and the positive and negative ions trade partners to form new neutral compounds. |
| Precipitate | A cloudy, solid (s) that forms from soluble (aq) reactants |
| Subscripts | The little numbers after the symbols to tell how many atoms there are |
| The driving force for chemical reactions | Elements react to become more stable by achieving 8 valence electrons. |
| Empirical Formula | a formula in which the quantities of each element are written in the lowest whole number ratio |
| Molecular Formula | a formula in which the quantities of each element are written in the whole number ratio that could be recuced further |
| Phase Symbols | (s) = solid; (l) =liquid; (g) =gas; (aq)=solution in water |
| How to predict spontaneous single replacement reactions | more reactive elements can kick less reactive elements out of their compounds and take their place. Remember that the "F elements" are the most reactive. |
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PRO Teacher
etucci
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