CHEM--HCl+lead(II) nitrate

完整方程式：2HCl(aq) + Pb(NO3)2 → PbCl2(s) + 2HNO3(aq)
離子方程式：2Cl-(aq) + Pb2+(aq) → PbCl2(s)
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Making lead(II) chloride

Lead(II) chloride can be made as a white precipitate by adding a solution containing chloride ions to lead(II) nitrate solution. You could use things like sodium chloride solution to provide the chloride ions, but it is usually easier just to add some dilute hydrochloric acid.

2HCl(aq) + Pb(NO3)2 → PbCl2(s) + 2HNO3(aq)
2Cl-(aq) + Pb2+(aq) → PbCl2(s)

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Note: If you add concentrated hydrochloric acid to excess, the lead(II) chloride precipitate will dissolve again. Complex ions like PbCl42- are produced, and these are soluble in water.

Pb2+ + 2Cl- =PbCl2