Question

Ustal stopnie utleniania : H2, H2O, NO2, Fe2O3, Ca(OH)2, H2SO4, HCl, CaSO4, Na3PO4, FeCl3, Al2(CO3)3

Answer 1

H2..........H(0)

H2O........H(+I), O(-II)

NO2........N(+IV), O(-II)

Fe2O3.....Fe(+III), O(-II)

Ca(OH)2...Ca(+II), O(-II), H(+I)

H2SO4.....H(+I), S(+VI), O(-II)

HCl.........H(+I), Cl(-I)

CaSO4.....Ca(+II), S(+VI), O(-II)

Na3PO4....Na(+I), P(+V), O(-II)

FeCl3.......Fe(+III), Cl(-I)

Al2(CO3)3..Al(+III), C(+IV), O(-II)