Inorganic Chemistry Answers

An electric power station annually burns 3.1 x 107 kg of coal containing 2.4 percent sulfur by mass. Calculate the volume of SO2 emitted at STP.

An aqueous solution of a platinum salt is electrolyzed at a current of 2.498 A for 3.00 h. As a result, 9.09 g of metallic Pt are formed at the cathode. Following this half reaction: Ptn+ + ne- → Pt, calculate the charge (represented by “n+” on the half reaction) on the Pt ions in this solution.

When an aqueous solution containing gold (III) salt is electrolyzed, metallic gold is deposited at the cathode and oxygen gas is generated at the anode. If 9.26 g of Au is deposited at the cathode, calculate the volume (in liters) of O2 generated at 23°C and 747 mmHg.

In a certain electrolysis experiment involving Al3+ ions, 60.2 kg of Al is

recovered when a current of 0.325 A is used. How many minutes did the

electrolysis last?

When an aqueous solution containing gold (III) salt is electrolyzed, metallic

gold is deposited at the cathode and oxygen gas is generated at the anode. If

9.26 g of Au is deposited at the cathode, calculate the volume (in liters) of O2

generated at 23°C and 747 mmHg.

An aqueous solution of a platinum salt is electrolyzed at a current of 2.498 A

for 3.00 h. As a result, 9.09 g of metallic Pt are formed at the cathode.

Following this half reaction: Ptn+ + ne- → Pt, calculate the charge (represented

by “n+” on the half reaction) on the Pt ions in this solution.

Will the following reaction occur spontaneously at 25°C, given that [Fe2+] = 0.60 M and [Cd2+] = 0.010 M? Cd(s) + Fe2+(aq) → Cd2+(aq) + Fe(s)

 ClO₃ ^- (aq) + I^- (aq)  I₂ (s) + Cl^- (aq)  [acidic]

Consider the oxidation of ammonia: 4NH₃(g) + 3O₂(g) →2N₂(g) + 6H₂O(l). If E° = + 0.06V for N₂ (g) + 6H⁺ + 6e^- → 2NH₃(g). Calculate the ΔG° for the reaction. 

In a certain experiment, with chemical equation Zn(s) + H+ (aq) → Zn2+(aq) + H2(g), the emf (E) of the cell is found to be 0.45 V at 25°C. Suppose that [Zn2+] = .8 M and PH2 = 1.0 atm. Calculate the molar concentration of H+.