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\(n_{FeCl_2}=0,6.0,2=0,12(mol)\\ FeO+2HCl \to FeCl_2+H_2O\\ n_{FeO}=n_{FeCl_2}=0,12(mol)\\ m_{FeO}=0,12.72=8,6(g)\)
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a, \(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)
Ta có: \(n_{Fe}=\dfrac{0,56}{56}=0,01\left(mol\right)\)
Theo PT: \(n_{H_2SO_4}=n_{FeSO_4}=n_{H_2}=n_{Fe}=0,01\left(mol\right)\)
b, \(m_{FeSO_4}=0,01.152=1,52\left(g\right)\)
\(V_{H_2}=0,01.22,4=0,224\left(l\right)\)
c, \(m_{ddH_2SO_4}=\dfrac{0,01.98}{19,6\%}=5\left(g\right)\)
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1.
\(n_{KNO_3}=0.15\cdot0.1=0.015\left(mol\right)\)
\(m_{KNO_3}=0.015\cdot101=1.515\left(g\right)\)
2.
\(m_{KOH}=200\cdot20\%=40\left(g\right)\)
Sau khi pha :
\(m_{dd_{KOH}}=\dfrac{40}{16\%}=250\left(g\right)\)
\(m_{H_2O\left(tv\right)}=250-200=50\left(g\right)\)
3.
\(n_{NaOH}=2\cdot1=2\left(mol\right)\)
Sau khi pha :
\(V_{dd_{NaOH}}=\dfrac{2}{0.1}=20\left(l\right)\)
\(V_{H_2o\left(tv\right)}=20-2=18\left(l\right)\)
3)
$n_{KNO_3} = 0,15.0,1 = 0,015(mol)$
$m_{KNO_3} = 0,015.101 = 1,515(gam)$
4)
$m_{KOH} = 200.20\% = 40(gam)$
$m_{dd\ KOH\ 16\%} = \dfrac{40}{16\%} = 250(gam)$
$\Rightarrow m_{H_2O} = 250 -200= 50(gam)$
5)
$n_{NaOH} = 2.1 = 2(mol)$
$V_{dd\ NaOH} = \dfrac{2}{0,1} = 20(lít)$
$\Rightarrow V_{H_2O} = 20 - 2 = 18(lít)$
4)
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