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\(a.n_{CO_2}=\dfrac{0,672}{22,4}=0,03mol\\ CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3+H_2O\)
\(n_{CO_2}=n_{Ca\left(OH\right)_2}=n_{CaCO_3}=0,03mol\\ m_{CaCO_3}=0,03.100=3g\\ b.V_{ddCa\left(OH\right)_2}=\dfrac{0,03}{1,5}=0,02l\)
2.
a, \(n_{HCl}=0,2.3,5=0,7\left(mol\right)\)
PTHH: CuO + 2HCl → CuCl2 + H2O
Mol: x 2x
PTHH: Fe2O3 + 6HCl → 2FeCl3 + 3H2O
Mol: y 6y
Ta có: \(\left\{{}\begin{matrix}80x+160y=20\\2x+6y=0,7\end{matrix}\right.\Leftrightarrow\left\{{}\begin{matrix}x=0,05\\y=0,1\end{matrix}\right.\)
b, \(m_{CuO}=0,05.80=4\left(g\right);m_{Fe_2O_3}=20-4=16\left(g\right)\)
c,
PTHH: CuO + 2HCl → CuCl2 + H2O
Mol: 0,05 0,05
PTHH: Fe2O3 + 6HCl → 2FeCl3 + 3H2O
Mol: 0,1 0,2
\(m_{CuCl_2}=0,05.135=6,75\left(g\right)\)
\(m_{FeCl_3}=0,1.162,5=16,25\left(g\right)\)
1.
a, \(n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PTHH: CO2 + Ba(OH)2 → BaCO3 + H2O
Mol: 0,1 0,1 0,1
b, \(C_{M_{ddBa\left(OH\right)_2}}=\dfrac{0,1}{0,2}=0,5M\)
c, \(m_{BaCO_3}=0,1.197=19,7\left(g\right)\)
\(a.n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\\ a.Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\\ 0,25.......0,25............0,25..........0,25\left(mol\right)\\ C_{MddCa\left(OH\right)_2}=\dfrac{0,25}{0,1}=2,5\left(M\right)\\ b.m_{\downarrow}=m_{CaCO_3}=100.0,25=25\left(g\right)\)
\(n_{CH_4}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\\ PTHH:CH_4+2O_2\underrightarrow{t^o}CO_2\uparrow+2H_2O\\ \left(mol\right)....0,25\rightarrow.......0,25\\ PTHH:CO_2+Ca\left(OH\right)_2\rightarrow CaCO_3\downarrow+H_2O\\ \left(mol\right)....0,25\rightarrow..0,25...........0,25\\ a,m_{CaCO_3}=0,25.100=25\left(g\right)\\ c,m_{Ca\left(OH\right)_2}=0,25.56=14\left(g\right)\\ C\%_{Ca\left(OH\right)_2}=\dfrac{14}{200}.100\%=7\%\)
PTHH: \(CO_2+Ba\left(OH\right)_2\rightarrow BaCO_3+H_2O\)
Ta có: \(n_{CO_2}=\dfrac{4,48}{22,4}=0,2\left(mol\right)=n_{Ba\left(OH\right)_2}=n_{BaCO_3}\) \(\Rightarrow\left\{{}\begin{matrix}C_{M_{Ba\left(OH\right)_2}}=\dfrac{0,2}{0,2}=1\left(M\right)\\m_{BaCO_3}=0,2\cdot197=39,4\left(g\right)\end{matrix}\right.\)
1.
\(n_{CO_2}=\dfrac{2.24}{22.4}=0.1\left(mol\right)\)
\(n_{Ca\left(OH\right)_2}=0.075\left(mol\right)\)
\(T=\dfrac{0.1}{0.075}=1.33\)
=> Tạo ra 2 muối
\(n_{CaCO_3}=a\left(mol\right),n_{Ca\left(HCO_3\right)_2}=b\left(mol\right)\)
Khi đó :
\(a+b=0.075\)
\(a+2b=0.1\)
\(\Rightarrow\left\{{}\begin{matrix}a=0.05\\b=0.025\end{matrix}\right.\)
\(m_{sp}=0.05\cdot100+0.025\cdot162=9.05\left(g\right)\)
2.
\(n_{CO_2}=\dfrac{1.12}{22.4}=0.05\left(mol\right)\)
\(n_{Ba\left(OH\right)_2}=0.2\cdot0.2=0.04\left(mol\right)\)
\(T=\dfrac{0.005}{0.04}=1.25\)
=> Tạo ra 2 muối
\(n_{BaCO_3}=a\left(mol\right),n_{Ba\left(HCO_3\right)_2}=b\left(mol\right)\)
Ta có :
\(a+b=0.04\)
\(a+2b=0.05\)
\(\Rightarrow\left\{{}\begin{matrix}a=0.03\\b=0.01\end{matrix}\right.\)
\(m_{BaCO_3}=0.03\cdot197=5.91\left(g\right)\)
