a) 2KClO3 \(\underrightarrow{t^o}\) 2KCl + 3O2
mol \(\dfrac{a}{122,5}\rightarrow\dfrac{a}{122,5}\dfrac{3a}{245}\)
2KMnO4 \(\underrightarrow{t^o}\) K2MnO4 + MnO2 + O 2
mol \(\dfrac{b}{158}\rightarrow\dfrac{b}{316}\dfrac{b}{316}\dfrac{b}{316}\)
\(74,5.\dfrac{a}{122,5}=197.\dfrac{b}{316}+87.\dfrac{b}{316}\)
⇔ \(\dfrac{74,5a}{122,5}=\dfrac{71b}{79}\)
⇒ \(\dfrac{a}{b}=\dfrac{71.122,5}{74,5.79}\approx1,478\)
b) \(\dfrac{3a}{245}:\dfrac{b}{316}=\dfrac{3a.316}{245.b}=\dfrac{948}{245}.\dfrac{a}{b}=\dfrac{948}{245}.1,478\approx5,72\)
nKClO3=a/122,5(mol)
nKMnO4=b/158(mol)
\(2KClO3\rightarrow2KCl+3O2\)(1)
a/122,5____a/122,5____1,5a/122,5
\(2KMnO4\rightarrow K2MnO4+MnO2+O2\)(2)
b/158_______b/136_________b/136___b/136
Ta có: 74.a/122,5=197.b/136+87.b/136
Giải ra:
=>a/b~1,478
b)
nO2(1)/nO2(2)=\(\dfrac{1,5a}{\dfrac{122,5}{\dfrac{b}{316}}}\)=\(\dfrac{948}{245}.\dfrac{a}{b}=\dfrac{948}{245}.1,478=5,72\)
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