Definitions of Acids and Bases - General Chemistry - Solved Quiz, Exercises of Chemistry

Download Definitions of Acids and Bases - General Chemistry - Solved Quiz and more Exercises Chemistry in PDF only on Docsity! Equilibrium – what is it? Equilibrium Constant Expressions: dc ba eq [D][C] [B][A] =K Meaning of the size of Keq Comparing Q and Keq Relating Kp and Kc Equilibrium Problems: Finding K Finding equilibrium concentrations LeChatelier’s Principle Definitions of Acids and Bases Ka, Kb, and Kw pH and pOH pKa and pKb Equilibrium problems Conjugate acids and bases Salt effects on pH Equilibria involving conjugates 1. Write the expression for Kc for the reaction below. Cu2+(aq) + 4 NH3(aq) ↔ Cu(NH3)42+(aq) 2. Write the expression for K for the reaction below. Al2S3(s) ↔ 2 Al3+(aq) + 3 S2-(aq) 3. Dinitrogen tetraoxide decomposes to nitrogen dioxide. N2O4(g) ↔ 2 NO2(g) Calculate the value of Kp, given that Kc = 5.88 × 10-3 at 273 K. (R = 0.08206 L·atm/mol·K) 4. A 4.00 L flask is filled with 0.75 mol SO3, 2.50 mol SO2, and 1.30 mol O2, and allowed to reach equilibrium. Predict the effect on the concentrations of SO3 as equilibrium is achieved by using Q, the reaction quotient. Assume the temperature of the mixture is chosen so that Kc = 12. 2 SO3(g) ↔ 2 SO2(g) + O2(g) 5. Excess Ca(IO3)2(s) is placed in 1.5 L of water. At equilibrium, the solution contains 0.011 M IO3-(aq). What is the equilibrium constant for the reaction below? Ca(IO3)2(s) ↔ Ca2+(aq) + 2 IO3-(aq) 6. A sealed tube is prepared with 1.07 atm PCl5 at 500 K. The PCl5 decomposes until equilibrium is established. PCl5(g) ↔ PCl3(g) + Cl2(g) The equilibrium pressure in the tube is 1.54 atm. Calculate Kp. 7. What is the pH of 2.1 × 10-5 M NaOH(aq) at 25 °C? (Kw = 1.0 × 10-14) Docsity.com