1. \(BaCO_3+H_2SO_4\rightarrow BaSO_4\downarrow+H_2O+CO_2\)
\(n_{BaCO_3}=\dfrac{15,76}{197}=0,08\left(mol\right)\)
\(m_{H_2SO_4}=490.0,098=48,02\left(g\right)\)
\(\Rightarrow n_{H_2SO_4}=\dfrac{48,02}{98}=0,49\left(mol\right)\)
=> Sau pư, BaCO3 hết, H2SO4 dư
a) \(m_{BaSO_4}=0,08.233=18,64\left(g\right)\)
b) \(m_{ddsaupư}=15,76+490-18,64=487,12\left(g\right)\)
\(m_{H_2SO_4dư}=98\left(0,49-0,08\right)=40,18\left(g\right)\)
\(\Rightarrow C\%ddH_2SO_4=\dfrac{40,18}{487,12}.100\%\approx8,2\%\)