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![](https://rs.olm.vn/images/avt/0.png?1311)
1. a) \(2Fe\left(OH\right)_3-^{t^o}\rightarrow Fe_2O_3+3H_2O\)
b)PT: 214----------------->160 (kg)
Đề: x------------------------>80(kg)
=> x=\(\dfrac{80.214}{160}=107\left(kg\right)\)
c) => \(H=\dfrac{107}{120}.100=89,17\%\)
2. a) \(CaCO_3-^{t^o}\rightarrow CaO+CO_2\)
\(n_{CaCO_3\left(pứ\right)}=n_{CaO}=\dfrac{151,2}{56}=2,7\)
=> \(m_{CaCO_3\left(pứ\right)}=2,7.100=270\left(kg\right)\)
=> \(H=\dfrac{270}{300}.100=90\%\)
b) \(n_{CO_2}=n_{CaO}=\dfrac{151200}{56}=2700\left(mol\right)\)
=> \(V_{CO_2}=2700.22,4=60480\left(l\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
PTHH: CaCO3 ---to→ CaO + CO2
Theo ĐLBTKL ta có: \(m_{CaCO_3}=m_{CaO}+m_{CO_2}=140+110=250\left(kg\right)\)
\(\%m_{CaCO_3}=\dfrac{250.100\%}{300}=83,33\%\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
$CaCO_3 \xrightarrow{t^o} CaO + CO_2$
$n_{CaO} = n_{CaCO_3} = \dfrac{150}{100} = 1,5(kmol)$
$m_{CaO} = 1,5.56 = 84(kg)$
b)
$n_{CaO} = n_{CaCO_3\ pư} = 1,5.80\% = 1,2(kmol)$
$m_{CaO} = 1,2.56 = 67,2(kg)$
\(a.PTHH:CaCO_3\underrightarrow{to}CaO+CO_2\\ n_{CaO}=n_{CaCO_3}\\ \rightarrow m_{CaO}=\dfrac{56}{100}.150=84\left(kg\right)\\ b.m_{CaO}=84.80\%=67,2\left(kg\right)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)
\(m_{CaCO_3} = 250.1000.75\% = 187500(kg)\\ \Rightarrow n_{CaCO_3} = \dfrac{187500}{100} = 1875(kmol)\\ CaCO_3 \xrightarrow{t^o} CaO + CO_2\)
Theo PTHH : \(n_{CaO} = n_{CaCO_3} = 1875\ mol\\ \Rightarrow m_{CaO} = 1875.56 = 105000(kg)\)
b)
\(n_{CO_2} = n_{CaCO_3} = 1875\ mol\\ \Rightarrow V_{CO_2} = 1875.22,4 = 42000(lít)\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a) $CaCO_3 \xrightarrow{t^o} CaO + CO_2$
b) $m_{CaCO_3} = 120 - 120.20\% = 96(gam)$
Theo PTHH :
$n_{CaO} = n_{CaCO_3} = \dfrac{96}{100} = 0,96(mol)$
$\Rightarrow m_{CaO} = 0,96.56 = 53,76(gam)$
c) $n_{CO_2} = n_{CaCO_3} = 0,96(mol)$
$\Rightarrow V_{CO_2} = 0,96.22,4 = 21,504(lít)$
![](https://rs.olm.vn/images/avt/0.png?1311)
\(m_{CaO\left(lt\right)}=\dfrac{94,08}{80\%}\cdot100\%=117,6kg\\ CaCO_3\xrightarrow[]{t^0}CaO+CO_2\\ \Rightarrow\dfrac{m_{CaCO_3}}{100}=\dfrac{117,6}{56}\\ \Rightarrow m_{CaCO_3}=210kg\\ \%m_{CaCO_3\left(trong.đá.vôi\right)}=\dfrac{210}{280}\cdot100\%=75\%\)
PT: \(CaCO_3\underrightarrow{t^o}CaO+CO_2\)
Ta có: \(n_{CaO}=\dfrac{94,08}{56}=1,68\left(kmol\right)\)
Theo PT: \(n_{CaCO_3\left(LT\right)}=n_{CaO}=1,68\left(kmol\right)\)
Mà: H = 80%
\(\Rightarrow n_{CaCO_3\left(TT\right)}=\dfrac{1,68}{80\%}=2,1\left(mol\right)\)
\(\Rightarrow m_{CaCO_3\left(TT\right)}=2,1.100=210\left(kg\right)\)
\(\Rightarrow\%CaCO_3=\dfrac{210}{280}.100\%=75\%\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(a,n_{CaCO_3}=\dfrac{50}{100}=0,5\left(mol\right)\\ PTHH:CaCO_3\rightarrow^{t^o}CaO+CO_2\\ \Rightarrow n_{CaO}=n_{CaCO_3}=0,5\left(mol\right)\\ b,n_{CO_2}=n_{CaCO_3}=0,5\left(mol\right)\\ \Rightarrow V_{CO_2\left(đktc\right)}=0,5\cdot22,4=11,2\left(l\right)\)
đề sai nha bạn kh tính ra thì lượng lý thuyết ít hơn lượng thực tế
Nung 300kg đá vôi thu được CaO. Biết H=90%
a, Tính mCaO=?
b, Tính mCO2=?