Аналогично.
m(I-) = (272 * 0.018 * 127)/ 2 * 96500 = 0.00322 г = 3,22 мг
Ca3(PO4)2+3Na2CO3=3CaCO3+2Na3PO4
1.8
2.
3.
4.
5.FeCl3
6.Fe3O4
7.Fe+H2SO4=Fe2(SO4)3=SO2+H2O
3Cu2S + 16HNO3 = 3Сu(NO3)2+ 3CuSO4 +10NO + 8H2O
S(2-) + 4H2O -8e = SO4(2-) + 8H(+)
NO3(-) + 4H(+) + 3e = NO + 2H2O
2Сu(+) - 2e = 2Cu(2+)
Ω(O) = 100%-34.57%-23.3% = 42.13%
Na:P:O = 34.57/23:23.3/31: 42.13/16= 1.5:0.75:2.63 = 2:1:3.5=4:2:7
Na4P2O7 -пирофосфат натрия