. Дана схема превращений:Fe+X→FeSO 4+Y→ FeI2. Определите вещества X и Y.

1) X – CuSO4, Y – BaI2

2) X – MgSO4, Y – I2

3) X – PbSO4, Y – PbI2

4) X – H2SO4(разб) , Y – MgI2

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