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Quarter Four

1.Balancing Equations 2.Chapter 8 Packet 3.Ideal Gas Law Problems 4.Ideal Gas Law Worksheet


Balancing Chemical Equations: 1.Solid calcium reacts with water to form aqueous calcium hydroxide and hydrogen gas. Ca(s) + 2H2O(l) ===> Ca(OH)2(aq) + H2(g) 2.Nitrogen dioxide gas reacts with water to form aqueous hydrogen nitrate and nitrogen monoxide gas. 3NO2(g) + H2O(l) ===> 2HNO3(aq) + NO(g) 3.Solid potassium chlorate decomposes to form solid potassium chloride and oxygen. 2KClO3(s) ===> 2KCl(s) + 3O2 4.Zinc oxide is made by reacting solid zinc sulfide with oxygen gas. Sulfur dioxide is also produced. 2ZnS(s) + 3O2(g) ===> 2ZnO + 2SO2 5.Solid calcium phosphate reacts with aqueous sulfuric acid to form phosphoric acid and solid calcium sulfate. Ca3(PO4)2(s) + 3H2SO4(aq) ===>2 H3PO4 + 3CaSO4(s) 6.Solid sodium combines with chlorine gas to produce solid sodium chloride. 2Na(s) + Cl2(g) ===> 2NaCl(s) 7.When solid copper reacts with silver nitrate, the products are aqueous copper (II) nitrate and solid silver. Cu(s) + 2AgNO3 ===> Cu(NO3)2(aq) + 2Ag(s) 8.In a blast furnace, the reaction between solid iron (III) oxide and carbon monoxide produces solid iron and carbon dioxide gas. Fe2O3(s) + 3CO =Δ=> 2Fe(s) + 3CO2(g) 9.When solid lithium reacts with aqueous aluminum sulfate the products are aqueous lithium sulfate and solid aluminum. 6Li(s) + Al2(SO4)3(aq) ===> 3Li2SO4(aq) + 2Al(s) 10.Hydrogen sulfide gas and oxygen gas react to produce sulfur dioxide gas and water vapor. 2H2S(g) + 3O2(g) ===> 2SO2(g) + 2H2O(g)


Ideal Gas Law Problems 1.What pressure, in atmospheres, is exerted by 3.25 mol of hydrogen gas in a 4.08 L container at 35째C? P = (0.325 mol)(0.0821 L x atm/ mol x K)(308 K) = 2.01 atm 4.08 L 2.A gas sample occupies 8.77 L at 20째C. What is the pressure in atmospheres, given that there are 1.45 mol of gas in the sample? P = (1.45 mol)(0.0821 L x atm/ mol x K)(293 K) = 3.98 atm 8.77 L



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