Inorganic Chemistry Answers

Find the value for solution with pH=7.0 and pe = 8.0 for the concentration of Fe²⁺, if the solution is in equilibrium with solid ferric hydroxide.

Find the value for solution with pH=7.0 and pe = 8.0 for the following.

1. (Fe³⁺)/(Fe^e+) ratio
2. (NO₃^-)/(NH₄⁺) ratio

Express the oxidation and reduction balanced overall reactions for the following.

1. (HOCI+HS^-) to (Cl^-+SO₄^2-)
2. (CH₃OH+O₂(aq) to (CO₂(g)+H₂O(I))
3. (MnO₄^-+) to MnO₂(s)

Express the oxidation and reduction half reactions of the following.

1. (HOCI+HS^-) to (Cl^-+SO₄^2-)
2. (CH₃OH+O₂(aq) to (CO₂(g)+H₂O(I))
3. (MnO₄^-+) to MnO₂(s)

Express the average oxidation state of C in the following:

1. CH₄
2. CH₂O
3. CO
4. CH₃CHOHCOOH

2. The pH of a 0.0516 M solution of nitrous acid, HNO2, is 2.34. What is its Ka?

1. What is the pH of a solution of HCl with a concentration of 1.2 X 10-3 M?

2. Calculate:

a. The rate constant for the radioactive disintegration of cobalt-60, an isotope used in

cancer therapy.

60Co27 decays with a half-life of 5.2 years to produce

60Ni28.

b. The fraction and the percentage of a sample of the 60Co27 isotope that will remain

after 15 years.

c. How long it takes for a sample of 60Co27 to disintegrate to the extent that only 2 % of

the original amount remains?

d. The half-life of 216Po84 is 0.16 s. How long does it take to reduce a sample of it to the

negligible amount of 0.000010 % of the original amount (1.0 x 10

-7

times the original

amount)?�

The reduction potential for Na (-2.71 V) is lower than that of the elements above it (Li, -3.04 V) and below it (K, -2.93 V). Explain the lack of a clear trend in the redox properties of the first 3 alkali metals. 

Aspirin (C9H8O4) in the form of a spherical tablet has a diameter of 0.04 inch. if the sample has a density of 1.4 g/cm3 How many carbon atoms does it contains?