\(n_{KMnO_4}=\dfrac{63,2}{158}=0,4\left(mol\right)\)
PTHH: 2KMnO4 --to--> K2MnO4 + MnO2 + O2
0,4 0,2
\(V_{O_2}=0,2.22,4=4,48\left(l\right)\)
\(n_{Zn}=\dfrac{39}{65}=0,6\left(mol\right)\)
PTHH: 2Zn + O2 --to--> 2ZnO
LTL: \(\dfrac{0,6}{2}>0,2\rightarrow Zn.dư\)
\(n_{KMnO_4}=\dfrac{63,2}{158}=0,4\left(mol\right)\)
\(pthh:2KMnO_4-t^o->K_2MnO_4+MnO_2+X\) =>X là O2
0,4 0,2
=> \(V_{O_2}=0,2.22,4=4,48\left(L\right)\)
\(n_{Zn}=\dfrac{39}{65}=0,6\left(mol\right)\)
pthh : \(2Zn+O_2-t^o->2ZnO \)
LTL : \(\dfrac{0,6}{2}< \dfrac{0,2}{1}\)
=> Zn dư => Không cháy hết