Ch.22 - Chemistry of the Nonmetals
Back
- Complete the exercises below. Hydrogen peroxide is capable of oxidizing: a. hydrazine to N₂ and H₂O. Write a balanced net ionic equation for this redox reaction. b. SO₂ to SO₄²⁻. Write a balanced net ionic equation for this redox reaction. c. NO₂⁻ to NO₃⁻. Write a balanced net ionic equation for this redox reaction. d. H₂S (g) to S (s). Write a balanced net ionic equation for this redox reaction.
Problem 83
- Complete the exercises below. A sulfuric acid plant produces a considerable amount of heat. This heat is used to generate electricity, which helps reduce operating costs. The synthesis of H₂SO₄ consists of three main chemical processes: a. oxidation of S to SO₂, b. oxidation of SO₂ to SO₃, c. the dissolving of SO₃ in H₂SO₄ and the subsequent reaction with water to form H₂SO₄. If the third process produces 130 kJ/mol, how much heat is produced in preparing a mole of H₂SO₄ from a mole of S? How much heat is produced in preparing 5000 pounds of H₂SO₄?
Problem 84
- Complete the exercises below. Ultrapure germanium, like silicon, is used in semiconductors. Germanium of “ordinary” purity is prepared by the high-temperature reduction of GeO₂ with carbon. The Ge is converted to GeCl₄ by treatment with Cl₂ and then purified by distillation; GeCl₄ is then hydrolyzed in water to GeO₂ and reduced to the elemental form with H₂. The element is then zone refined. Write a balanced chemical equation for each of the chemical transformations in the course of forming ultrapure Ge from GeO₂.
Problem 88