1. A saturated solution of Cu(OH)2 at 85Celsuis has [Cu2+] = 0.013M and [OH-] = 0.026M. What is the value of the Ksp for Cu(OH)2 at 85 Celsuis?

Cu(OH)2<=> Cu2+ + 2 OH-

a- 0.0000044

b-0.039

c-0.00034

d.2.0

e.0.0000088

2. Which of the following statements correctly descries the hydronium-hydroxide balance in the given solution

a-In bases, [OH-} is less thatn [H3O+]

b- in bases [OH-} = [H3O+]

c- in acids [OH-}is greater thatn [H3O+]

d- in neutral solitions [H3O+]=[H2O]

e- in bases [OH-] os greater than [H3O+]

3- the equilibrium constant for the production of carbon dixoide from carbon monoxide and oxygen is Keq=2x 10 11. this means that the reaction mixture at equilibrium is likely to consist of:

a- mostly products

b- twice as much starting material as product

c-an equal muxure of products and reactants

d-mostly starting materials

e- twice as much product as starting material

4. in the following reaction what is the effect on the direction of the reaction if more SO2 is added to the reaction mixture? 2 SO2+ O2 <=> 2 SO3

a- the rate of formation of products is increased

b- the catalyst for the reaction is used up

c- the equilibrium shifts to produce more products

d- the position of the equilibrium reamains unchanged

e- the equilibrium shifts to produce more reactants