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PTHH : `Ba(OH)_2 + SO_2 -> BaSO_3 + H_2O`
`a)`
`600ml = 0,6l`
`n_{SO_2} = (6,72)/(22,4) = 0,3` `mol`
`n_{Ba(OH)_2} = n_{SO_2} = 0,3` `mol`
`C_{M_(Ba(OH)_2)} = (0,3)/(0,6) =0,5` `M`
`b)`
`n_{BaSO_3} = n_{SO_3} = 0,3` `mol`
`m_{BaSO_3} = 0,3 . 217 = 65,1` `gam`
`c)`
PTHH : `Ba(OH)_2 + 2HCl -> BaCl_2 + 2H_2O`
Ta có : `n_{Ba(OH)_2} = 0,3` `mol`
`n_{HCl} = 2 . n_{Ba(OH)_2} = 0,6` `mol`
`V_{HCl} = (0,6)/(3,5) = 6/35` `l`
a, \(n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\)
PTHH: CO2 + Ca(OH)2 → CaCO3 ↓ + H2O
Mol: 0,25 0,25 0,25
\(C_{M_{ddCa\left(OH\right)_2}}=\dfrac{0,25}{0,1}=2,5M\)
b, \(m_{CaCO_3}=0,25.100=25\left(g\right)\)
c,
PTHH: Ca(OH)2 + 2HCl → CaCl2 + 2H2O
Mol: 0,25 0,5
\(m_{ddHCl}=\dfrac{0,5.36,5.100}{20}=91,25\left(g\right)\)
\(a.n_{CO_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)\\ a.Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\\ 0,25.......0,25............0,25..........0,25\left(mol\right)\\ C_{MddCa\left(OH\right)_2}=\dfrac{0,25}{0,1}=2,5\left(M\right)\\ b.m_{\downarrow}=m_{CaCO_3}=100.0,25=25\left(g\right)\)
a) PTHH : Ba(OH)2 + CO2 => BaCO3 + H2O
b) Ta có : nCo2 = \(\dfrac{8,96}{22,4}\)= 0,4 mol
nBa(OH)2 = nCO2 = 0,4 mol
Nồng độ mol của dung dịch Ba(OH)2 đã dùng là
Cm = \(\dfrac{0,4}{0,8}\)= 0,5 M
c) nBaCO3 = nCo2 = 0.4 mol
=> mBaCO3 = 0,4 x ( 137 + 12 + 16 x 3 )
= 0,4 x 197
= 78.8
\(n_{SO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\\ PTHH:SO_2+Ca\left(OH\right)_2\rightarrow CaSO_3\downarrow+H_2O\\ \Rightarrow n_{CaSO_3}=n_{SO_2}=0,1\left(mol\right)\\ \Rightarrow m_{CaSO_3}=120\cdot0,1=12\left(g\right)\)
\(n_{SO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PTHH: SO2 + Ca(OH)2 → CaSO3 + H2O
Mol: 0,1 0,1
\(m_{CaSO_3}=0,1.120=12\left(g\right)\)
a, \(n_{CO_2}=\dfrac{6,72}{22,4}=0,3\left(mol\right)\)
PTHH: Ba(OH)2 + CO2 → BaCO3 + H2O
Mol: 0,3 0,3 0,3
b, \(C_{M_{ddBa\left(OH\right)_2}}=\dfrac{0,3}{0,2}=1,5M\)
c, \(m_{BaCO_3}=0,3.197=59,1\left(g\right)\)
\(a.n_{CO_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\\ CO_2+Ba\left(OH\right)_2\rightarrow BaCO_3+H_2O\\ 0,1...........0,1.............0,1..........0,1\left(mol\right)\\ b.m_{kt}=m_{BaCO_3}=0,1.197=19,7\left(g\right)\\ c.C_{MddBa\left(OH\right)_2}=\dfrac{0,1}{0,2}=0,5\left(M\right)\)
nSO2 = 0.056/22.4=0.0025 mol
Ca(OH)2 + SO2 --> CaSO3 + H2O
0.0025_____0.0025___0.0025
VddCa(OH)2 = 0.0025/0.5 = 0.005 (l)
mCaSO3 = 0.0025*120 = 0.3 g
c)
nCaSO3 = 24/120 = 0.2 mol
CaSO3 + SO2 + H2O --> Ca(HSO3)2
0.2______0.2
VSO2 = 0.2*22.4=4.48 l