1. CHEMISTRY<br />4th PERIOD REVIEW<br />CHAPTER 3B, LESSONS 3.1, 3.2, 3.3<br />ANSWER THE FOLLOWING QUESTIONS: <br />Signs that indicate that a chemical reaction is taking place.<br />How can we increase the rate of a chemical reaction?’<br />What happens during a chemical reaction?<br />What is a chemical equation?<br />What is a precipitate?<br />What is an endothermic reaction?<br />What is an exothermic reaction?<br />State the Law of Conservation of Mass, and the name of the scientist who discover it.<br />What is a subscript?<br />What is a coefficient?<br />What are the reactants?<br />What are the products?<br />What is bond energy?<br />IN THE FOLLOWING CHEMICAL EQUATIONS, IDENTIFY THE REACTANTS AND THE PRODUCTS:<br />1. CaO + O2 CO2 + H2O<br />2. C6H12O6 C2H5OH + CO2<br />3. Al2(SO4)3 + 6KOH 2Al(OH)3 + 3K2SO4<br />INDICATE HOW THE FOLLOWING SYMBOLS ARE READ IN A CHEMICAL EQUATION:<br />1. <br />2. + <br />3. <br /> 4. (s)<br /> 5. (aq)<br /> 6. (l)<br /> 7. (g)<br /> <br />BALANCE THE FOLLOWING CHEMICAL EQUATIONS:<br />Fe2O3 + C Fe + CO<br />Fe + O2 Fe2O3<br />Al + Br2 AlBr3<br />Pb(NO3)2 + NaCl PbCl2 + NaNO3<br />CLASSIFY THE FOLLOWING REACTIONS AS: SYNTHESIS, DECOMPOSITION, SIGLE REPLACEMENT, DOUBLE REPLACEMENT, COMBUSTION, EXOTHERMIC OR ENDOTHERMIC.<br />2Mg + O2 2MgO____________________________________<br />C6H12O6 + O2 CO2 + H2O + E____________________________________<br />CO2 + H2O + E C6H12O6 + O2____________________________________<br />CuCO3 CuO + CO2____________________________________<br />AgNO3 + NaCl AgCl + NaNO3____________________________________<br />C6H12O6 2C2H6O + 2CO2____________________________________<br />Br2 + BaI2 BaBr2 + I2____________________________________<br />CH4 + 2O2 CO2 + 2H2O____________________________________<br />WRITE A CHEMICAL EQUATION FOR THE FOLLOWING REACTIONS:<br />Solid lead reacts with oxygen gas to produce lead oxide (PbO2)<br />Heating solid aluminum oxide (Al2O3) produces solid aluminum and oxygen gas<br />Dinitrogen pentoxide in the presence of platinum as a catalyst is burned to form nitrogen gas (N2) with oxygen gas (O2)<br />Aqueous solutions of potassium fluoride (KF) and calcium nitride (Ca(NO3)2) react to form a precipitate of calcium fluoride (CaF2) and aqueous potassium nitride (KNO3)<br />Solid phosphorus reacts with chloride gas to form solid phosphorus pentachloride<br />