Đốt cháy hoàn toàn 3,2gam lưu huỳnh trong khí Oxi tính Khối lương của SO2 thu đc
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![](https://rs.olm.vn/images/avt/0.png?1311)
![](https://rs.olm.vn/images/avt/0.png?1311)
Ta có: \(n_S=\dfrac{6,4}{32}=0,2\left(mol\right)\)
a. PTHH: S + O2 ---to---> SO2
Theo PT: \(n_{SO_2}=n_S=0,2\left(mol\right)\)
=> \(m_{SO_2}=0,2.64=12,8\left(g\right)\)
b. Theo PT: \(n_{O_2}=n_S=0,2\left(mol\right)\)
=> \(m_{O_2}=0,2.32=6,4\left(g\right)\)
a)S+O2-------->SO2
b)n S=6,4/32=0,2(mol)
Theo pthh
n SO2 =n S=0,2(mol)
V SO2=0,2.22,4=4,48(mol)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{SO_2}=\dfrac{V_{SO_2\left(ĐKTC\right)}}{22,4}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
PTHH: \(S+O_2\underrightarrow{t^o}SO_2\)
...........1.........1........1......
...........0,3......0,3......0,3.....
a. \(m_S=n_S\cdot M_S=0,3\cdot32=9,6\left(g\right)\)
b. \(V_{O_2\left(ĐKTC\right)}=n_{O_2}\cdot22,4=0,3\cdot22,4=6,72\left(l\right)\)
\(V_{kk\left(ĐKTC\right)}=V_{O_2\left(ĐKTC\right)}\cdot5=6,72\cdot5=33,6\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a. PTHH: S + O2 ---to---. SO2 (1)
Ta có: \(n_S=\dfrac{9,6}{32}=0,3\left(mol\right)\)
Theo PT(1): \(n_{SO_2}=n_S=0,3\left(mol\right)\)
=> \(V_{SO_2}=0,3.22,4=6,72\left(lít\right)\)
b. PTHH: SO2 + Ca(OH)2 ---> CaSO3↓ + H2O (2)
Theo PT(2): \(n_{CaSO_3}=n_{SO_2}=0,3\left(mol\right)\)
=> \(m_{CaSO_3}=0,3.120=36\left(g\right)\)
\(n_S=\dfrac{9,6}{32}=0,3\left(mol\right)\)
PTHH: S + O2 ---to→ SO2
Mol: 0,3 0,3
\(V_{SO_2}=0,3.22,4=6,72\left(l\right)\)
PTHH: SO2 + Ca(OH)2 → CaSO3 + H2O
Mol: 0,3 0,3
\(m_{CaSO_3}=0,3.120=36\left(g\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(n_{O2}=\dfrac{3,36}{22,4}=0,15\left(mol\right)\)
Pt : \(S+O_2\underrightarrow{t^o}SO_2|\)
1 1 1
0,15 0,15 0,15
a) \(n_S=\dfrac{0,15.1}{1}=0,15\left(mol\right)\)
⇒ \(m_S=0,15.32=4,8\left(g\right)\)
b) \(n_{SO2}=\dfrac{0,15.1}{1}=0,15\left(mol\right)\)
\(V_{SO2\left(dktc\right)}=0,15.22,4=3,36\left(l\right)\)
Chúc bạn học tốt
![](https://rs.olm.vn/images/avt/0.png?1311)
Định luật bảo toàn khối lượng :
\(m_S+m_{O2}=m_{SO2}\)
3,2 + \(m_{O2}\) = 6,4
⇒ \(m_{O2}=6,4-3,2=3,2\left(g\right)\)
Chúc bạn học tốt
\(BTKL: \\ m_S+m_{O_2}=m_{SO_2}\\ 3,2+m_{O_2}=6,4\\ m_{O_2}=6,4-3,2=3,1(g)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
nS = 1,92/32 = 0,06 (mol)
PTHH: S + O2 -> (t°) SO2
Mol: 0,06 ---> 0,06 ---> 0,06
VSO2 (LT) = 0,06 . 22,4 = 1,344 (l)
VSO2 (TT) = 1,344 . 90% = 1,2096 (l)
![](https://rs.olm.vn/images/avt/0.png?1311)
PTHH : \(S+O_2\left(t^o\right)->SO_2\) (1)
\(SO_2+H_2O->H_2SO_3\) (2)
\(n_{SO_2}=\dfrac{V_{đktc}}{22,4}=\dfrac{1,12}{22,4}=0,05\left(mol\right)\)
Từ (1) -> \(n_S=n_{SO_2}=0,05\left(mol\right)\)
-> \(m_S=n.M=1,6\left(g\right)\)
Từ (2) -> \(n_{H_2SO_3}=n_{SO_2}=0,05\left(mol\right)\)
-> \(m_{H_2SO_3}=n.M=0,05.\left(2+32+16.3\right)=4,1\left(g\right)\)
nS=\(\dfrac{3,2}{32}\)=0,1(mol)
.PTHH:S+O2 \(\underrightarrow{t^o}\)SO2
nS = nO2 =nSO2=0,1(mol)
mSO2=64.0,1=6,4(g)
PTHH : \(S+O_2->SO_2\) (1)
Ta có : \(n_S=\dfrac{m}{M}=\dfrac{3.2}{32}=0.1\left(mol\right)\)
Từ (1) => \(n_S=n_{SO_2}=0.1\left(mol\right)\)
=> \(m_{SO_2}=n.M=\) 0.1 x (32 + 16 x 2) = 0.1 x 64 = 6.4 (g)