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8080sveta
@8080sveta
July 2021
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Осадок НЕ выпадает при добавлении раствора сульфида натрия к раствору соли ,содержащей ион:
1)Cu2+
2)K+
3)Ag+
4)Pb2+
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ЧерныйБрат
1. Na₂S + CuCl₂ = CuS (осадок) + 2 NaCl
2. Na₂S + 2 KCl = K₂S + 2 NaCl
3. Na₂S + 2 AgNO₃ = Ag₂S (осадок) + 2 NaNO₃
4. Na₂S + PbCl₂ = PbS (осадок) + 2 NaCl
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Answers & Comments
2. Na₂S + 2 KCl = K₂S + 2 NaCl
3. Na₂S + 2 AgNO₃ = Ag₂S (осадок) + 2 NaNO₃
4. Na₂S + PbCl₂ = PbS (осадок) + 2 NaCl