15.When 5.00 mL of a solution of KCl(aq)is added to an excessof 1.00 mol/L Pb(NO3)2(aq), a precipitate of PbCl2(s)isformed. The mass of the precipitate is found to be 0.075 g. (a)Write a balanced equation for the reaction.(b)Calculate the molar concentration of the KCl(aq)solution. 16.Write a sentence to distinguish between the terms in eachof the following pairs: 17.Calculate the pH of each of the following solutions: 18.Calculate the concentration of hydrogen ions in solutionswith the following pH values: 19.The pH of a hydrochloric acid solution was measured to be 1.1.(a)Write an ionization equation for hydrochloric acid. (b) What is the concentration of hydrogen ions in thesolution?(c)What is the concentration of the HCl(aq)solution?20.How do acids differ from bases (a) according to the Arrhenius definitions?(b)according to the BrØnsted-Lowry definitions? 21.Identify the two acid–base conjugate pairs in each of thefollowing reactions: (a)H3O+(aq)NH3(aq)→H2O(l)NH4+(aq)(b) OH(aq)HSO3(aq)→H2O(l)SO32(aq)(c)HPO42(aq)HSO4(aq)→H2PO4(aq)SO42(aq)(d) HS(aq)HCO3(aq)→CO32(aq)H2S(aq)22.A 25.0-mL portion of 0.125 mol/L hydrochloric acidrequires 21.4 mL of potassium hydroxide solution forneutralization. Calculate the molar concentration of thepotassium hydroxide solution.23.A 20.0-mL portion of sulfuric acid solution requires 16.8 mL of 0.250 mol/L sodium hydroxide solution forneutralization. Calculate the molar concentration of thesulfuric acid solution.24.A 10.0-mL portion of calcium hydroxide solution neutral-izes 15.5 mL of 0.100 mol/L nitric acid. Calculate the molarconcentration of the barium hydroxide solution.25.Calculate the molar concentration of a solution of phos-phoric acid if 17.8 mL of it neutralizes 20.0 mL of0.050 mol/L calcium hydroxide. 26. A solution of KOH is prepared by dissolving 2.00 g of KOHin water to a final volume of 250 mL of solution. Whatvolume of this solution will neutralize 20.0 mL of 0.115mol/L sulfuric acid?27.Oxalic acid dihydrate, (COOH)2• 2H2O, reacts with sodiumhydroxide according to the following equation:(COOH)2•2 H2O(s)2 NaOH(aq)→(COONa)2(aq)4 H2O(l) If a 0.118-g sample of oxalic acid dihydrate is dissolved in water and exactly neutralized with 10.4 mL of a NaOH solution, what is the molar concentration of the NaOH solution?
NELAppendixDDChemistry 11 Review813Gas LawsSTP: 0°C and 101.325 kPa (exact values)SATP: 25°C and 100 kPa (exact values)101.325 kPa 1 atm 760 mm Hg (exact values) or 101 kPa (for calculation)absolute zero 0 K or 273.15°C, or 273°C (for calculation)T(K) t(°C) 273 (for calculation)Boyle’s law:p1v1p2v2(for constant temperature and amount of gas)Charles’s law:Tv11Tv22(for constant pressure and amount of gas)pressure–temperature law:T
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