Ta có: \(n_{Ba}=\dfrac{8,22}{137}=0,06\left(mol\right)\)
Ta có: \(C_{\%_{H_2SO_4}}=\dfrac{m_{H_2SO_4}}{200}.100\%=1,96\%\)
=> \(m_{H_2SO_4}=3,92\left(g\right)\)
=> \(n_{H_2SO_4}=\dfrac{3,92}{98}=0,04\left(mol\right)\)
PTHH: Ba + H2SO4 ---> BaSO4↓ + H2
Ta thấy: \(\dfrac{0,06}{1}>\dfrac{0,04}{1}\)
=> Ba dư
Theo PT: \(n_{BaSO_4}=n_{H_2SO_4}=0,04\left(mol\right)\)
=> \(m_{BaSO_4}=0,04.233=9,32\left(g\right)\)
Theo PT: \(n_{H_2}=n_{H_2SO_4}=0,04\left(mol\right)\)
=> \(m_{H_2}=0,04.2=0,08\left(g\right)\)
Ta có: \(m_{dd_{BaSO_4}}=8,22+200-0,08=208,14\left(g\right)\)
=> \(C_{\%_{BaSO_4}}=\dfrac{9,32}{208,14}.100\%\approx4,48\%\)
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