Inorganic Chemistry: Group 16 – Flashcards
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elements in Group 16
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O, S, Se, Te, Po
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Why do S, Se, and Te have poor pi-orbital overlap?
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Larger atomic size hinders double bonding with itself.
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S + Se + heat →
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SeS
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Molecular oxygen exists in what state?
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triplet
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Is singlet oxygen more or less reactive than triplet oxygen?
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more reactive
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hydrogen sulfide
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H₂S
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2H₂S + 3O₂ (excess) →
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2H₂O + 2SO₂
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2H₂S + 3O₂ (deficit) →
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2H₂O + 2S
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H₂S + I₂ →
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HI + S
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H₂S + Fe³⁺ →
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Fe²⁺ + S + H⁺
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H₂S + O₂ →
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H₂O + S
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H₂S + H₂O →
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H⁺ + S²⁻
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H₂S + 2NaOH ←
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Na₂S + H₂O
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reaction of H₂S with metals: 2Ag + H₂S →
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Ag₂S + H₂
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H₂O₂ + KI →
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H₂O + I₂ (reduction)
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H₂O₂ + PbS →
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H₂O + PbSO₄ (reduction)
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H₂O₂ + 2Fe²⁺ + 2H⁺ →
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2Fe³⁺ + 2H₂O (reduction)
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H₂O₂ + Cl₂ →
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H₂O + HCl (oxidation)
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H₂O₂ + KMnO₄ + H⁺ →
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H₂O + Mn²⁺ (oxidation)
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sulfurous acid
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H₂SO₃
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SO₂ + H₂O →
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H₂SO₃
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H₂SO₃ + H₂S →
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H₂O + S
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Na₂SO₃ + O₂ →
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Na₂SO₄
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thiosulfuric acid
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H₂S₂O₃
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SO₃ + H₂S
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H₂S₂O₃
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AgBr (yellow) + light →
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Ag (black) + Br₂
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AgBr + S₂O₃²⁻ (fixing solution)
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[Ag(S₂O₃)₂]³⁻ + Br⁻
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SO₃ + H₂O →
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H₂SO₄
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SeO₂ + H₂O₂ →
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H₂SeO₄
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Se + 4H₂O +3Cl₂ →
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H₂SeO₄ + 6HCl
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Selenic acid is a strong
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oxidizer
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H₂SeO₄ + 2H⁺ + 2Cl⁻ →
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H₂SeO₃ + H₂O+ Cl₂
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Selenocysteine is coded by
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a UGA codon, normally a termination codon
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210Po decays to
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206Pb + helium
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H₂SeO₄ + 2H⁺ + 2Cl⁻ →
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H₂SeO₃ + H₂O+ Cl₂
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Selenocysteine is coded by
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a UGA codon, normally a termination codon
