1. Write the equilibrium expression, Kc, for the following reactions
a) Fe(CO)6(g) = Fe(g) + 6CO(g)
b) CaCO3(s) = CaO(s) + CO2(g)
(answer to b. Kc= [CO2])
(in c; H2O is not included in the expression. why?)
2.practice exercises on p. 638 to 641
3. At 2000 C, Kc = 4.1x10 -4 for
N2(g) + O2(g) = 2 NO(g)
If the equilibrium concentration of N2 is 3 M and of NO is 0.05 M, what is the equilibrium concentration of O2?
(answer = 2.03 M explain)
4. A mixture of 2 mole of SO2, 2 mole of O2, and 0 mole of SO3 are placed in a 1 liter flask and kept at l000 K until equilibrium is reached. At equilibrium the vessel is found to contain 0.875 mol of SO3. a) What is the equilibrium concentration of SO3?b) At equilibrium, how many moles of SO2 and O2 are left?c) Calculate the concentration equilibrium constant for the reaction: 2SO2(g) + O2(g) = 2SO3(g)
(answer to c = 0.39 )
5. a) State the common valence (how many bonds are ordinarily formed to the atom) of each of the elements from C to Ne?
b) Use these to explain the bonding in N2
and F2 and C(diamond)?
6. If the equilibrim constant for the
reaction AgCl
= Ag+ + Cl- is 1.8x10-10
what are the equilibrium constants for the following
a) Ag + (aq) + Cl - (aq) = AgCl(s)
b) 2 AgCl(s) = 2Ag + (aq) + 2Cl - (aq)
(answer to a 5.5x10+9 explain)