3СH3-CH=CH-CH2-CH3 +4K2Cr2O7+16H2SO4 ->3CH3-COOH + 3CH3-CH2-COOH+4K2SO4 + 4Cr2(SO4)3 + 16H2O
2C(-1)-8e ->2C(+3) | 3
2Cr(+6) +6e ->2Cr(+3) | 4
6C(-1)+8Cr(+6) -> 6C(+3) +8Cr(+3)
1) 2CaHPO4 + P2O5 + 3H2O = 2Ca(H2PO4)2
2) <span>3Ca(H2PO4)2 = Ca3(PO4)2 (ОСАДОК) + 4H3PO4</span> (КИПЯЧЕНИЕ)