notebook. the fume hoods, prepare asure 3 mL of water and level of 3 mL of solution ed. - bath to reduce bumping almly. brium test tube. rium system to go to the ent, add it dropwise until Loose only from the 1 M ter adding 10 drops, try rium system back to its dd it dropwise until the se only from the 1 M nt does not work, try ution into a test tube. = until you observe a esolution in a boiling agitate the test tube r2 min and then place als from time to time. -m the ice bath at the own "snow globe". d NH4Cl to cover the the sides of the test more NH4Cl. FeCl3 and 1 mL of 0.1 M KSCN in a 100-mL by combining 1 mL volumetric flask and filling the flask with DI H2O. Add 3 mL of this FeCl3-KSCN solution each to two test tubes. 2. To the first one, add 5 drops of 0.1 M FeCl3. 3. To the second one, add 5 drops of 0.1 M KSCN. After recording your observations, add 5 drops of 0.1 M AgNO3 to the same test tube. Mix the solution thoroughly and wait for 5 min. The white precipitate is AgSCN. Waste Disposal Liquids: hazardous waste Practice Problems . Problem 1: Consider the following reaction at equilibrium: N2(g) + 3H2(g) → 2NH3(g) AH-92 kJ/mol a) How is the pressure of ammonia affected if some nitrogen gas is added? b) How is the amount of hydrogen gas affected if the volume of the reaction vessel is doubled? How is K affected? c) How is the pressure of hydrogen gas affected if the temperature is raised? How is K affected? d) How are the rate of the reverse reaction and the pressure of hydrogen gas affected if a catalyst is added? Problem 2: Consider the following reaction at equilibrium: Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g) a) How is [ZnCl2] affected if some HCl is added? b) Some hydrogen gas is removed. How does this affect the pH (pH = -log[H3O+])? c) Some NaOH is added. How does this affect the pH and the pressure of hydrogen gas? d) Some solid zinc is added. How does this affect [HC1]? Answers: 1a) increase, b) increase, no change, c) increase, decrease, d) increase, no change, 2a) increase, b) increase, c) increase, decrease, d) no change gas ever Lecree HCI loc A C 17 77

notebook. the fume hoods, prepare asure 3 mL of water and level of 3 mL of solution ed. - bath to reduce bumping almly. brium test tube. rium system to go to the ent, add it dropwise until Loose only from the 1 M ter adding 10 drops, try rium system back to its dd it dropwise until the se only from the 1 M nt does not work, try ution into a test tube. = until you observe a esolution in a boiling agitate the test tube r2 min and then place als from time to time. -m the ice bath at the own "snow globe". d NH4Cl to cover the the sides of the test more NH4Cl. FeCl3 and 1 mL of 0.1 M KSCN in a 100-mL by combining 1 mL volumetric flask and filling the flask with DI H2O. Add 3 mL of this FeCl3-KSCN solution each to two test tubes. 2. To the first one, add 5 drops of 0.1 M FeCl3. 3. To the second one, add 5 drops of 0.1 M KSCN. After recording your observations, add 5 drops of 0.1 M AgNO3 to the same test tube. Mix the solution thoroughly and wait for 5 min. The white precipitate is AgSCN. Waste Disposal Liquids: hazardous waste Practice Problems . Problem 1: Consider the following reaction at equilibrium: N2(g) + 3H2(g) → 2NH3(g) AH-92 kJ/mol a) How is the pressure of ammonia affected if some nitrogen gas is added? b) How is the amount of hydrogen gas affected if the volume of the reaction vessel is doubled? How is K affected? c) How is the pressure of hydrogen gas affected if the temperature is raised? How is K affected? d) How are the rate of the reverse reaction and the pressure of hydrogen gas affected if a catalyst is added? Problem 2: Consider the following reaction at equilibrium: Zn(s) + 2HCl(aq) = ZnCl2(aq) + H2(g) a) How is [ZnCl2] affected if some HCl is added? b) Some hydrogen gas is removed. How does this affect the pH (pH = -log[H3O+])? c) Some NaOH is added. How does this affect the pH and the pressure of hydrogen gas? d) Some solid zinc is added. How does this affect [HC1]? Answers: 1a) increase, b) increase, no change, c) increase, decrease, d) increase, no change, 2a) increase, b) increase, c) increase, decrease, d) no change gas ever Lecree HCI loc A C 17 77

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter8: Sampling, Standardization, And Calibration

Section: Chapter Questions

Problem 8.14QAP

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