1)K₂Cr₂O₇ + 7H₂SO₄ + 8KI ---> Cr₂(SO₄)₃ + 4K₂SO₄ + 4I₂ + 7H₂O2Cr(+VII) + 8e ---->2Cr(+III) I*12J(-) - 2e ---->J2(0) I*42) CaO + H₂O --->Ca(OH)₂ CaO + SO₂ --->CaSO₃ N₂O₃ + H₂O --->2HNO₂ N₂O₅ + Na₂O --->2NaNO₃ BaO + H₂SO₄ --->BaSO₄ + H₂O BaO + Na₂O --->nie zachodzi
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1)
K₂Cr₂O₇ + 7H₂SO₄ + 8KI ---> Cr₂(SO₄)₃ + 4K₂SO₄ + 4I₂ + 7H₂O
2Cr(+VII) + 8e ---->2Cr(+III) I*1
2J(-) - 2e ---->J2(0) I*4
2)
CaO + H₂O --->Ca(OH)₂
CaO + SO₂ --->CaSO₃
N₂O₃ + H₂O --->2HNO₂
N₂O₅ + Na₂O --->2NaNO₃
BaO + H₂SO₄ --->BaSO₄ + H₂O
BaO + Na₂O --->nie zachodzi