Here are the answers for the previous part of this question, it has multiple parts (these are all at 25 degrees):
A) 2CH4(g)→C2H6(g)+H2(g)
ΔH∘rxn 64.6 kJ
B) 2NH3(g)→N2H4(g)+H2(g)
ΔH∘rxn 187.2 kJ
C) N2(g)+O2(g)→2NO(g)
ΔH∘rxn 182.6 kJ
D) 2KClO3(s)→2KCl(s)+3O2(g)
ΔH∘rxn -77.6 kJ
E) For the reaction in part A calculate ΔS∘rxn at 25 ∘C.
ΔS∘rxn -12.7

I NEED:
F) For the reaction in part B calculate ΔS∘rxn at 25 ∘C.
G) For the reaction in part C calculate ΔS∘rxn at 25 ∘C.
H) For the reaction in part D calculate ΔS∘rxn at 25 ∘C.

Calculate the pH of 0.1 mol/L H2SO4 ; you are given the second dissociation constant of the acid to be 0.01.

Use the table of thermodynamic data in your text, a Chemistry/Physics CRC, or the internet (but be careful with data off the internet), to calculate the molar enthalpy of the following reactions:

1) An aqueous solution of sodium hydroxide reacts with an equeous solution of hydrochloric acid, yielding water.

2) An aqueous solution of sodium hydroxide reacts with an aqueous solution of ammonium chloride, yielding aqueous ammonia, NH₃, and water.

3) An aqueous solution of hydrochloric acid reacts with aqueous ammonia, NH₃, yielding aqueous ammonium chloride.

The reaction A(aq) ---> B(aq) + C(aq) is a first order reaction. The half-life of A(aq) is 86.6 s at 25.0^oC and its half-life is 66.2 s at 45.0^oC. What is its half-life (in s) at 65.0^oC?

The force constants for the diatomic molecules CO and HI are 1860 N/m and 320 N/m respectively.

Plot the potential energy curves for these two in a way that highlights their differences (i.e. on a single graph).

Calculate the frequency of motion for both molecules (does this result surprise you?).

Calculate the wavelength of light needed to excite these molecules from their vibrational ground states (v=0) to their vibrational first excited states (v=1).

10. Potassium oxalate is a monohydrate salt that forms colorless, odorless crystals. Oxalic acid is a diprotic acid with Ka1 = 5.4 x 10-2 and Ka2 = 5.3 x 10-5. (a) If 1.843 g potassium oxalate monohydrate is dissolved in enough water to make 100.0 mL of solution, what will be the pH of the solution? (b) What is the equilibrium concentration of the fully protonated oxalic acid? (c) Is this solution a buffer? Explain.

Calculate the pH for 0.80 M N(CH3)3, Kb=2.4x10^-7

Draw the titration curve (pH versus mL of NaOH added) that would be obtained from the titration of 30 mL of a 0.10 M solution of an unknown triprotic acid, H3A (Ka1 = 1.26 x 10–3; Ka2 = 5.6 x 10–6; Ka3 = 3.32 x 10–10) with 0.10 M NaOH. Indicate the volume needed to reach the first, second, and third equivalence points and the pH at the half equivalence points for the three titration regions.

A 1.500 Liter vessel is filled with 1.500 moles of hydrogen gas, and 2.500 mol of iodine gas to form hydrogen iodide gas at 448 oC. The reaction has an equilibrium constant of 53.5. What is the equilibrium molar concentration of all species?

5) A 100.0 mL sample of 0.18 M HClO4 is titrated with 0.27 M LiOH. Determine the pH of the solution

a) before the addition of any LiOH.

b) after the addition of 30.0 mL of LiOH.

c) after the addition of 50.0 mL of LiOH.

d) after the addition of 66.67 mL of LiOH (this is the equivalence point).

e) after the addition of 75.0 mL of LiOH.

Please define each with credible references:

Pauli’s Exclusion Principle:

Aufbau Principle:

Hund’s Rule:

Periodic Trends

Atomic Size:

Ionization Energy:

Electron Affinity:

Metallic Character:

pH of salts

Determine if the following salts will raise, lower, or not change the pH of pure water when dissolved in the water.

a) NaCN

b) FeCl₃

c) HCOOH

d) K₂SO₄

e) K₃PO₄

f) SrCl₂

g) (CH₃)₂NH

h) Al(NO₃)₃

i) Li₂CO₃

j) KBr

k) Ca(NO₃)₂

l) NH₄Cl

m) KBrO₂

n) Zn(OH)₂

o) Ba(OCl)₂

p) CH₃NH₃Br

q) NaMnO₄

r) Li₂SO₃

s) BaI₂

t) SnBr₄

What is the purpose of adding cold water in williamson ether reactions

How would you prove that a silica microsphere made by the Stobber process is actually spherical? What affect might deviations from an exact spherical shape have on crystallizing opals and their optical properties?

60.0 mL of 0.100M KOH(aq) is mixed with 40.0 mL of 0.250M HCl(aq) at 25 oC. Assuming that volumes are additive, the pH of resulting solution is