CHEMICAL REACTIONS

• CHEMICAL REACTION - chemical change in which one or more substances are destroyed
• REACTANTS - destroyed by chemical change (bonds break)
• PRODUCTS - created by chemical change (new bonds form)
• s - solid
• l - liquid
• g - gas
• aq - aqueous solution
• aqueous solution - substance destroyed in H2O
• + - seperates two or more reactants/products
• -> - yield sign
• EVIDENCE OF FOR CHEMICAL REACTION: 1. evolution of light or heat
• EVIDENCE OF FOR CHEMICAL REACTION: 2. temperature change - increase or decrease to the surroundings
• EVIDENCE OF FOR CHEMICAL REACTION: 3. formation of a gas - bubbling or odor
• EVIDENCE OF FOR CHEMICAL REACTION: 4. color change - formation of new substance
• EVIDENCE OF FOR CHEMICAL REACTION: 5. formation of a precipitate - new solid forms reaction of two aqueous solution
• WORD EQUATION - indicate the reactants and products in chemical reaction
• SKELETON EQUATION - uses chemical formulas rather than words
• CONSERVATION OF MASS - atoms are neither created nor destroyed in a chemical reaction
• CONSERVED: 1. Mass
• CONSERVED: 2. types of atoms
• CONSERVED: 3. number of each atoms
• NOT CONSERVED: 1. physical state (solid, liquid, gas)
• NOT CONSERVED: 2. volume
• NOT CONSERVED: 3. number of moles of reactants/products
• SINGLE REPLACEMENT REACTION - single uncombined element
• DOUBLE REPLACEMENT REACTION - parts of two aqueous ionic compounds
• SOLUBLE COMPOUNDS - break down when put in water
• INSOLUBLE COMPOUNDS - do not break when put in water
• SYNTHESIS REACTION - two or more simple substances
• DECOMPOSITION REACTION - more complex substance
• ELECTRICAL CURRENT - used to chemically seperate water into oxygen gas and hydrogen gas
• COMBUSTION REACTION - are exothermic