Acid Base Buffers
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Acid Base Buffers

Course Number: CHEM 2B, Winter 2009

College/University: UC Davis

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UC Davis - CHEM - 2B
CHEM 2B: acids and basesClemens1. The following is a list of acids and their Ka values: H2S Ka = 1.1x10-7 HOCl Ka = 3.5x10-8 HNO2 Ka = 4.5x10-4 a) which acid is the strongest? b) Write the Ka expression for this acid. c) Which acid has the strong
UC Davis - CHEM - 2B
CHEM 2B: Weak acids and bases 2Clemens1. The percent ionization of benzoic acid (C6H5COOH) in a 0.110M solution is 2.4%. What is the pH of the solution?2. The pH of an 11g/L aqueous solution of caproic acid, HC6H11O2, is found to be 2.94. What
UC Davis - CHEM - 2B
Ch12 Practice Problems #1Clemens1. What is the difference between a permanent and nonpermanent gas? 2. A liquid has a heat of vaporization of 29.1kJ/mol and a vapor pressure of 0.703 atm at 25.0oC. What is its vapor pressure at 95.0oC?3. Calciu
UC Davis - CHEM - 2B
UC Davis - CHEM - 2B
UC Davis - CHEM - 2B
UC Davis - CHEM - 2B
UC Davis - CHEM - 2B
UC Davis - CHEM - 2B
CHEM 2B: EntropyClemens1. Which member of the following pairs has the greatest entropy? a) NH3 (l) or H2NNH2 (l) b) CO2 (g) or CO2 (s) c) PbS (s) or PbF2 (s) d) H2(g) at 25oC or H2(g) at 100oC 2. Consider the following reaction: C (s, graphite) +
UC Davis - CHEM - 2B
CHEM 2B: Equilibrium 1Clemens1. Please make sure to do # 3, 7, 112. A 0.500L reaction vessel at 700K contains 1.20x10-3 mol SO2, 5.0x10-4 mol O2 and 1.0x10-4 mol SO3. At 700K, Kc = 1.7x106 for the reaction that occurs when oxygen and sulfur dio
UC Davis - CHEM - 2B
CHEM 2B: Equilibrium 2 1. Consider the equilibrium system:Clemens2 H2 (g) + S2 (g) 2 H2S (g)a) write an equilibrium expression for this reactionb) Predict the direction the position of equilibrium will shift as a result of the following distu
UC Davis - CHEM - 2B
CHEM 2B Practice: SolubilityClemensFor Ksp constants for the problems, please see the table in ch 18 of your textbook.1. For each of the following compounds, write a Ksp expression: a) Magnesium carbonateb) Iron (II) hydroxidec) calcium pho
UC Davis - CHEM - 2B
CHEM 2B Practice: Solubility #2 1. Please try #41 from chapter 18.ClemensFor Ksp constants for the problems, please see the table in ch 18 of your textbook.2. What is the molar solubility of Copper (II) carbonate in 1.00M NH3? Ksp (CuCO3) = 3.0
UC Davis - CHEM - 2B
Chem 2B: more equilibrium fun!Clemens1. A flask at 298 K contains 0.500 atm of N2O4 and 0.500 atm of NO. After reaching equilibrium, the partial pressure of N2O4 is 0.600 atm. What is the total pressure at equilibrium? Find Kp and Kc. N2O4 (g) 2
UC Davis - CHEM - 2B
Chem 2B: pH of Salts!1. Find pH of 0.15M NH4Cl.2. If 22.0mL of 0.15M NH4Cl is titrated with 0.15M NaOH, find the pH when a. When 10.0mL of NaOH is added b. When 11.0mL of NaOH is added c. When 22.0mL of NaOH is added d. When 25.0mL of NaOH is add
UC Davis - CHEM - 2B
CHEM 2B: Solutions 1Clemens1. A 0.750M solution of sulfuric acid in water has a density of 1.046g/mL at 20oC. What is the_ of this solution? a. mole fraction b. mass percent c. molarity2. Ethylene glycol is used in antifreeze. If the density of
UC Davis - CHEM - 2B
CHEM 2B: Solutions and Colligative PropertiesClemens1. Calculate the vapor pressure of a 1.0% by mass aqueous solution of ethylene glycol (HOCH2CH2OH) at 0.0oC. The vapor pressure of water at this temperature is 4.58 mmHg.2. how many grams of s
UC Davis - CHEM - 2B
Thermo Practice Problems #1Clemens1. A 0.922g sample of naphthalene (C10H8) is burned in a calorimeter that has a heat capacity of 0.944 kJ/K. The temperature of the calorimeter rose from 15.73oC to 19.75oC. Calculate the heat of combustion for n
UC Davis - CHEM - 2B
Thermo Practice Problems #2Clemens1. 2.896g of methanol (CH3OH) was burned in a bomb calorimeter with a heat capacity of 2.56kJ/oC. The bomb was immersed in 1900.g of water. After combustion, the temperature of the calorimeter and water rose by 6
UC Davis - CHEM - 2B
Thermo Practice Problems #3Clemens1. Calculate the enthalpy change for the following reaction: N2O (g) + NO2 (g) 3 NO (g) Given the following N2 (g) + O2 (g) 2NO (g) 2 NO (g) + O2 (g) 2 NO2 (g) 2 N2O (g) 2 N2 (g) + O2 (g) H = 180.7kJ H = -113
UC Davis - CHEM - 2B
Chem 2B: Titrations!Clemens1. Consider the titration of 20.0mL of 0.150 M pyridine (C5H5N, Kb =1.5x10-9) with 0.150M HBr. a) what volume of HBr must be added to reach the equivalence point? The midpoint?b) What is the pH before any acid is adde
UC Davis - ARE - 100A
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UC Davis - ARE - 100A
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UC Davis - PHI - 1
UC Davis - PHI - 1
UC Davis - JPN - 2
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UC Davis - JPN - 2
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University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
University of Texas - M - 408 L
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