BaCl2+ H2SO4→ BaSO4+ 2HCl
(mol) 0,1 0,1 0,2 a) \(m_{BaCl_2}=\)200.10,4%=20,8(g)
→\(n_{BaCl_2}=\dfrac{m}{M}=\dfrac{20,8}{208}=0,1\left(mol\right)\)
=>\(m_{BaSO_4}=n.M=\)0,1.233=23,3(g)
b) Đổi:200ml=0,2 lít
CM=\(\dfrac{n_{H_2SO_4}}{V_{dd}H_2SO_4}\)=\(\dfrac{0,1}{0,2}=0,5M\)
c)ta có: d=\(\dfrac{m}{V}\)=> \(m_{dd}H_2SO_4=d.V=\)1,14.200=228(g)
mdd sau phản ứng=\(m_{BaCl_2}+m_{dd}H_2SO_4\)=200+228=428(g)
mHCl=n.M=0,2.36,5=7,3(g)
=>C%dd HCl=\(\dfrac{m_{HCl}}{m_{dd}}.100\%=\dfrac{7,3}{428}.100\%=1,7\%\)