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Exposure to Cr+6 can be by inhalation or ingestion.
Question 3
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H2S contains sulfur which has an oxidation number of -2. |
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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. |
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The oxidation number of a monoatomic ion is the same as its ionic charge, such that Na ion has an oxidation number of +1. |
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The oxidation number of each atom in an element is zero, such that the oxidation number of Cl2 is -2. |
Question 4
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The worker used a strike-anywhere match instead of a safety match. |
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The box did not contain red phosphorus and powdered glass. |
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The match did not contain antimony trisulfide, sulfur, and potassium chlorate. |
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The match contained tetraphosphorus trisulfide, sulfur, lead oxide, and powdered glass. |
Question 5
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Potassium permanganate |
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Potassium chlorate |
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Potassium peroxide |
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Potassium dichromate |
Question 6
1. The components of ordinary gunpowder are elemental sulfur, charcoal, and potassium nitrate. When gunpowder explodes, these components react as follows:
3S8(s) + 16C(s) + 32KNO3(s)
Sulfur Carbon Potassium nitrate
16K2O(s) + 16CO2(g) + 16N2(g) + 24SO2(g)
Potassium oxide Carbon dioxide Nitrogen Sulfur dioxide
For this redox reaction, the reducing agents are __________ and __________.
Question 8
1. One or more of the ions that do not participate in an oxidation-reduction reaction are called __________ ions.
1. The oxidation number of chlorine in KClO4 is __________.
Question 11
Your total response must be at least 200 words in length.
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