stehiometrija

Submitted by lejla93 on Fri, 03/28/2014 - 17:55
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uravnotezi sljedece oksidoredukcione jednacine:

CdS+J2+HCl----->CdCl2+HJ+S

Zn+HNO3------>Zn(NO3)2+NH4NH3+H2O

KMnO4+H2O2+H2SO4---->KHSO4+MNSO4+H2O+O2

molim vas da mi ovo uradite jer nisam jos uvijek savladala dobro ove jednacine...unaprijed hvala!!!

 

milicaradenkovic's picture

milicaradenkovic - Fri, 03/28/2014 - 18:28

CdS+I2+2HCl---------------->CdCl2+2HI+S

I0(+1e-)-------------------->I-1/2

S2-(-2e-)-------------------->S0/1

Zn+4HNO3------------------>Zn(NO3)2+2NO2+2H2O a ne reakcija koju si ti napisala

Zn0(-2e-)-------------------->Zn2+/1

N5+(+1e-)-------------------->N4+/2

2KMnO4+5H2O2+4H2SO4----------------->2KHSO4+2MnSO4+8H2O+5O2

O-1(-1e-)----------------->O0/5

Mn7+(+5e-)----------------->Mn2+/1