a. PTHH: \(2ZnS+3O_2\underrightarrow{t^o}2ZnO+2SO_2\\ 0,1mol:0,15mol\rightarrow0,1mol:0,1mol\)
b. \(n_{ZnS}=\dfrac{9,7}{97}=0,1\left(mol\right)\)
\(n_{O_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Ta có tỉ lệ: \(\dfrac{0,1}{2}< \dfrac{0,2}{3}\)
Vậy ZnS phản ứng hết, Oxi phản ứng dư.
\(n_{O_2du}=0,2-0,15=0,5\left(mol\right)\)
c. \(V_{SO_2}=0,1.22,4=2,24\left(l\right)\)
\(n_{ZnS}=\dfrac{9,7}{97}=0,1\left(mol\right)\)
\(n_{O_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
a. PTHH: \(2ZnS+3O_2-t^o->2ZnO+2SO_2\)
b. Theo PT ta lập tỉ lệ:
\(\dfrac{0,1}{2}< \dfrac{0,2}{3}\Rightarrow\) \(O_2\) dư. ZnS hết => tính theo \(n_{ZnS}\)
Theo PT: \(n_{O_2\left(pư\right)}=\dfrac{0,1.3}{2}=0,15\left(mol\right)\)
\(\Rightarrow n_{O_2\left(dư\right)}=0,1-0,15=0,05\left(mol\right)\)
\(\Rightarrow m_{O_2\left(dư\right)}=0,05.32=1,6\left(g\right)\)
c. Theo PT ta có: \(n_{SO_2}=n_{ZnS}=0,1\left(mol\right)\)
\(\Rightarrow V_{SO_2}=0,1.22,4=2,24\left(l\right)\)
a) \(2ZnS+3O_2\underrightarrow{t^0}2ZnO+2SO_2\)
b) \(n_{ZnS}=\dfrac{9,7}{97}=0,1\left(mol\right)\)
\(n_{O_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)\)
Theo PT:
\(\left\{{}\begin{matrix}\dfrac{n_{ZnS}}{2}=\dfrac{0,1}{2}=0,05\\\dfrac{n_{O_2}}{3}=\dfrac{0,2}{3}=\dfrac{1}{15}\end{matrix}\right.\) \(\Rightarrow\) ZnS phản ứng hết. O2 dư như vậy tính toán theo \(n_{ZnS}\)
Theo PTHH: \(n_{ZnS}:n_{O_2}=2:3\Rightarrow n_{O_2}=n_{ZnS}.\dfrac{3}{2}=0,1.\dfrac{3}{2}=0,15\left(mol\right)\)
\(\Rightarrow n_{O_2\left(dư\right)}=n_{O_2\left(bđ\right)}-n_{O_2\left(pư\right)}=0,2-0,15=0,05\left(mol\right)\)
\(\Rightarrow m_{O_2\left(dư\right)}=0,05.32=1,6\left(g\right)\)
c) Theo PTHH: \(n_{SO_2}:n_{ZnS}=1:1\)
\(\Rightarrow n_{SO_2}=n_{ZnS}=0,1\left(mol\right)\)
\(\Rightarrow V_{SO_2}=0,1.22,4=2,24\left(l\right)\)
