Two review questions for AP Chemistry. Both are conceptual and I have done a bit of work on both of them but after all the math questions (buffers and titrations etc) my head kinda hurts a bit and I can not think straight right now. Please help me out!
-Explain each of the following in terms of atomic and molecular structures and/or intermolecular forces
a) Solid K and molten KNO3 conduct an electric current, whereas solid KNO3 does not.
b) SbCl3 has measurable dipole moment, whereas SbCl5 does not.
c) The normal boiling point of CCl4 is 77 degrees C, whereas that of CBr4 is 190 degrees C.
d) NaI(s) is very soluble in water, whereas I2(s) has a solubility of only .03g per 100 g of water.
Please post a reply to any of these parts even if you do not know the other parts.
This is the mixed thermochem question now.
-The reaction between NO and H2 is believed to occur in the following three-step process.
NO + NO <--> N2O2 (fast)
N2O2 + H2 --> N2O + H2O (slow)
N2O + H2 --> N2 + H2O (fast)
a) Write a balanced equation for the overall reaction.
b) Identify the intermediates in the reaction. Explain your reasoning.
c) From the mechanism represented above, a student correctly deduces that the rate law for the reaction is rate = k[NO]2[H2]. The student then concludes that (1) the reaction is third-order and (2) the mmechanisminvolves the simultaneous collision of two NO molecules and an H2 molecule. Are conclusions (1) and (2) correct? Explain.
d) Explain why an increase in temperature increases the rate constant, k, given the rratelaw in (c).
These seemed like classic types of AP questions so I searched previous posts but I was unable to find anything. There is another question that is racking my brain but it involves too much math to be considered purely conceptual. Thanks for any help you can give me.
-DaKid
P.S. How do you make the degree sign? Thanks again.