chem final mc Flashcards
Which of the systems in equilibrium is represented below will exhibit a shift to the left (toward reactants) when the pressure on the system is increased by reducing the volume of the system? (Assume that temperature is constant)
SO2Cl2(g) <— SO2 (g) + Cl2(g)
Which of the following changes to a reaction system in equilibrium would affect the value of the equilibrium constant, Keq, for the reaction? (Assume in each case that all other conditions are held constant.)
Increasing the temperature of the system
A closed rigid container contains distilled water and N2(g) at equilibrium. Actions that would increase the concentration of N2(g) in the water include which of the following?
I. Shaking the container vigorously
II. Raising the temperature of the water
III. Injecting more N2 (g) into the container
III only
A large piece of wood can burn slowly, but wood in the form of sawdust can combust explosively. The primary reason for the difference is that compared with a large piece of wood, sawdust
Has a greater surface area per kilogram
Consider the reaction system,
CoO(s) + H2(g) = Co(s) + H2O(g)
The equilibrium constant expression is
[H2O]/[H2]
A 0.300 M solution of HCl is prepared by adding some 1.50 M HCI to a 500 mL volumetric flask and diluting to the mark. What volume of 1.50 M HCl must be added?
100 mL
Who developed the concept of the pH?
Sorensen
A 0.1 M solution of which salt is the most basic?
NaHCO3
Given the equilibrium, 2SO2(g) + O2(g), if this equilibrium is etablished by beginning with equal number of moles of SO2 and O2 in a 1.0 Libter bulb, the the following must be true at equilibrium:
[SO2] < [O2]
Which 0.10 M aqueous solution exhibits the lowest electrical conductivity?
C2H5OH
1.000 g of a weak base is titrated with 1.000 M aqueous HCl to give the data shown. What is the identity of the base?
Ammonia, NH3 (pKa of NH4 + = 9.3)
