1. Chem 1151 Review Chapters 5-7

2. Chap 5 Memorize ideal gas law (and related laws: Boyle, Charles, Avogadro, gas density), root mean square speed eqn and relationship to effusion rate, gas mixtures and Dalton’s Law (memorize eqn), KMT, avg kinetic energy eqn, STP What is the pressure of 91.3 g oxygen in a 8.58 L cylinder at 21 o C?

3. Chap 5 Calculate the density of ammonia gas at 31 o C and 751 mm Hg. Mg 3 N 2 (s) + 6H 2 O(l)  3Mg(OH) 2 (s) + 2NH 3 (g) What volume of NH 3 is produced at 24 o C and 753 mmHg from 4.56 g Mg 3 N 2 ? A 200.0 mL flask contains 1.03 mg O 2 and 0.56 mg He at 15 o C. Calculate the partial and total pressures.

4. Chap 5 Calc the rms speed of CO 2 at STP. At what temperature must N 2 O 4 be to have the same rms speed? 4.83 mL of an unknown gas effuses in the same time it takes 9.23 mL Ar. Assuming the same effusion container and conditions, what is the mass of the unknown?

5. Chap 5 2LiOH(s) + CO 2 (g)  Li 2 CO 3 (s) + H 2 O(l) How many grams of LiOH are needed to react with 5.8E+2 L CO 2 at STP? 2HCl(aq) + MgCO 3 (s)  CO 2 (g) + H 2 O(l) + MgCl 2 (aq) An 18.6 mL volume of HCl reacts completely with solid MgCO 3. The volume of CO 2 formed is 159 mL at 23 o C and 731 mm Hg. What is the molarity of the HCl soln?

6. Chap 6 Memorize q = ms ΔT, First Law, defn of heat of formation rxn, ΔH rxn = appropriate summation of heats of formation of reactants and products, also ≈ approp. Summation of bond energies (D values, Ch 8) 6.49 Hess’s Law problems Sign conventions, exo- and endo-thermic

7. Chap 6 2H 2 S(g) + 3O 2 (g)  2H 2 O(l) + 2SO 2 (g) –Calculate ΔH rxn –If 100.0 g H 2 S burns in xs oxygen, how much heat is released? –If 800.0 kJ of energy was released, how many grams of SO 2 were produced? –Calculate ΔH rxn for H 2 O(l) + SO 2 (g)  H 2 S(g) + 3/2 O 2 (g).

8. Chap 7 Memorize E = h ν = hc/λ Learn quantum number meaning and relationships, to write electronic configurations for neutral and charged atoms Learn periodicity of IE, EA, atomic size, electronegativity Paramagnetic vs diamagnetic atoms

9. Chap 7 Bohr atom and electronic transitions de Broglie Eqn λ = h/(mv) Calculate the energy for photons with –1.365E+6 Hz frequency –535 nm wavelength Describe the AO shapes for s, p, d orbitals State the number of orbitals in 3d, 4p, 6s; state the max # of electrons in them

10. Chap 7 Write the electron configs for Mn, S, Cr, K, Si, Ti 2+, Na +, Cl - Which are paramagnetic? Arrange in order of –increasing IE: Mg, Ca, S –increasing size: F, S, Cl –More negative EA: As, Br –More negative EA: Se, K –Increasing size: S 2-, K +, Ar