1
Cu + 2HNO3(st.) ----->Cu (NO3)2 +NO2 +H2O
Cuo -----> Cu+II + 2e- / 2
2N+V + 2e- -----> 2N+IV / 2
2Fe Cl3 +H2S ------> 2Fe Cl2 +S +2HCl
Fe+III + e- ---> Fe+II / 2
S-II ------> So + 2e- / 3
2
xmol -------- 19 g
1 mol -------- 111 g
x= 0,17 mol
Cm=n/V
Cm= 0,17/0,5 --------- zamienilem na dm3
Cm=0,34 mol/dm3
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1
Cu + 2HNO3(st.) ----->Cu (NO3)2 +NO2 +H2O
Cuo -----> Cu+II + 2e- / 2
2N+V + 2e- -----> 2N+IV / 2
2Fe Cl3 +H2S ------> 2Fe Cl2 +S +2HCl
Fe+III + e- ---> Fe+II / 2
S-II ------> So + 2e- / 3
2
xmol -------- 19 g
1 mol -------- 111 g
x= 0,17 mol
Cm=n/V
Cm= 0,17/0,5 --------- zamienilem na dm3
Cm=0,34 mol/dm3