1) An oxidation number describes the combining capability of one ion to another ion or of one atom to another atom. Which of the following statements regarding oxidation numbers is FALSE?
- H2S contains sulfur which has an oxidation number of -2.
- Each oxygen in KMnO4 has an oxidation number of -2, and the oxidation number of K is +1; therefore, the oxidation number on Mn in this compound is +7.
- The oxidation number of a monoatomic ion is the same as its ionic charge, such that Na ion has an oxidation number of +1.
- The oxidation number of each atom in an element is zero, such that the oxidation number of Cl2 is -2.
2) Fireworks are items intentionally designed for the purpose of producing visual and audible effect by means of combustion, explosion, deflagration, and detonation reactions. Select which of the following statements is FALSE regarding fireworks.
| When shipping fireworks, the Department of Transportation (DOT) requires that the applicable EX-number and Department of Defense (DOD) national stock number be included in the description. | ||
| A component of fireworks is a mixture of oxidizing and reducing agent. | ||
| Fireworks could not be used as weapons of mass destruction. | ||
| The most commonly encountered oxidizers in fireworks include sodium chlorite, sodium chlorate, and sodium perchlorate.
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3) Metallic peroxides and metallic hypochlorites, when used as bleaching agents, are distinguished by calling the latter chlorine bleach.
- For hypochlorite bleaching agents, why do manufacturers sometimes identify their available chlorine on product labels? Explain what available chlorine means?
- Discuss some hazards associated with metallic hypochlorites.
- Discuss how water can effectively extinguish oxidizer supported fires.