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chapter 23
Kc and Kp
LeChatlier's Principle
Acids and Bases
Ice Ice Baby
100
High mass isotopes break apart and release lots of energy
What is Fission
100
What is Kc and Kp for: HF(aq) + H2O(l) -> H3O+(aq) + F-(aq)
Kc = [H3O+][F-]/[HF] no Kp
100
N2(g) + 3H2(g) -> 2NH3(g). deltaH = -92.2 Kj/mol. What happens when you increase the temp? decrease the temp?
shifts left, shifts right.
100
What when you put a strong acid or base into water?
100% dissociation
100
Find the new concentrations of each component: H2(g) + I2(g) ->2HI(g). [H2] = .500 [I2] = .500 [HI] = 0. The Kc is 54.3.
[H2] = .107M, [I2] = .107M, [HI] = .786M
200
low mass isotopes combine and lots of energy is released
What is Fusion
200
What is Kc and Kp for (NH4)2Se(s) -> 2NH3(g) + H2S(g)
Kc = [NH3]^2[H2Se] Kp = P^2NH3PH2Se
200
N2(g) + 3H2(g) -> 2NH3(g). deltaH = 93.4Kj/mol. What happens when you add products? Add reactions?
shifts left. shifts right.
200
6 strong acids:
HBr, HI, HCl, HClO4, HNO3, H2SO4
200
Find the pH: HI + H2O -> H3O + I-, [HI]o= .12
pH = .90
300
the mass required for the chain reaction to become self-sustaining
What is Critical Mass
300
Find the Kp for CO(g) + 2H2(g) -> CH3OH(g). The Kc is 10.5 at 220degree C.
Kp = 6.41 x 10^-3
300
N2(g) + 3H2(g) -> 2NH3(g). deltaH = 94.3Kj/mol. What happens when you add a catalyst?
Nothing!
300
Describe the Ka and pKa for a strong acid and a weak acid.
strong: large Ka, small pKa. weak: small Ka, large pKa
300
Find the pH: KOH + H2O -> OH- + K+. [KOH]o = .20
pH = 13.3
400
What are the four types of radiation in order from least dangerous to most dangerous? What can block the most dangerous two?
What is alpha, beta, x-ray, gamma. Lead.
400
Find the Kp and Kc CaCO3(s) -> CaO(s) + CO2(g). Pco2 = .236atm at 800 degrees C.
Kp = .236. Kc = 2.68 x 10-3
400
2NOBr(g) -> 2NO(g) + Br2. deltaH = 16.1Kj/mol. What happens when you increase the volume? decrease the volume?
shift right. shift left.
400
What is a lewis acid? lewis base?
acid: electron pair acceptor. base: electron pair donor
400
Find the pH of a .36M CH3COONa solution. The Ka = 5.6 x 10^-10.
pH = 9.15
500
Find the mass defect, change in E, and binding E(in MeV/nucleon) for 19 9 F. AM = 18.9984. (Use proton=1.007825 and neutron=1.008665)
mass defect = .1587amu. Change in E = -1.43 x 10^16J/mol. Binding E = 7811.3MeV/nucleon.
500
Find the Kc's in relation to one another for: A.) N2(g) + #H2(g) -> 2NH3, B.)1/2N2(g) + 3/2H2(g) -> NH3(g), C.)1/3N2(g) + H2(g) -> 2/3NH3(g).
Ka = Kb^2. Ka = Kc^3. Kb^2 = Kc^3 or Kb = Kc^3/2.
500
N2(g) + 3H2(g) -> 2NH3(g). deltaH = -93.3. What happens when you increase the pressure? decrease the pressure?
shift right. shift left.
500
Which is lewis acid? BF3 or BCl3? Fe+3 or Fe+2?
BCL3, Fe+3
500
Find the pH .10M NH3 solution. The Kb is 1.8 x 10^-5
pH = 11.13