水酸化鉛

水酸化鉛 価格

水酸化鉛 化学特性,用途語,生産方法

• 解説

  水酸化鉛,赤褐色，水に難溶性の固体．不安定で水を放って二酸化鉛にかわる．正確にPb(OH)4の化学式に相当するものは得られない．
  森北出版「化学辞典（第2版）

• 製造

  【Ⅱ】水酸化鉛(Ⅳ)：Pb(OH)4(275.23)．鉛酸カリウムK2[PbO3]を酢酸で分解すると得られる．

• 化学的特性

  white powder(s) [CRC10]

• 物理的性質

  White amorphous powder; density 7.41 g/cm³; dehydrates above 130°C and decomposes at 145°C; slightly soluble in water, 155 mg/L at 20°C; KSP 1.42x10^-20 at 25°C; soluble in dilute acids and alkalies; insoluble in acetone and acetic acid.

• 使用

  Lead hydroxide is used in making porous glass; in electrical-insulating paper; in electrolytes in sealed nickel-cadmium batteries; in recovery of uranium from seawater; and as a catalyst for oxidation of cyclododecanol.

• 製造方法

  Lead dioxide is produced by oxidizing an alkaline slurry of lead monoxide with chlorine, sodium hypochlorite, or bleaching powder. Alternatively, it is obtained by passing chlorine into a hot aqueous suspension of lead sulfate and magnesium hydroxide. The ionic reaction is:
  Pb(OH)_3ˉ +ClOˉ → PbO₂ + Clˉ+ OHˉ + H₂O
  It also is produced by electrolysis of acidic solutions of lead salts using a lead or platinum electrode. In such electrolytic process, lead dioxide is deposited on the anode of the cell.
  Insoluble powdered lead dioxide also may be obtained when lead tetroxide is heated with nitric acid:
  Pb₃ O₄ + 4HNO₃ → 2Pb(N)₃)₂ + PbO₂ + 2H₂O
  Lead dioxide also can be prepared by fusing lead monoxide with a mixture of sodium nitrate and sodium chlorate.

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