mbacl2=150.10,4/100=15,6g=>nbacl2=15,6/208=0,075mol
mh2so4=250.9,8/100=24,5g=>nh2so4=24,5/98=0,25mol
pt: bacl2 + h2so4 -> baso4 + 2 hcl
ncó: 0,075 0,25
npứ: 0,075 0,075 0,075 0,15
ndư: 0 0,175
dd x sau pứ hcl và h2so4 dư
=> mbaso4=0,075.233=17,475g
mdd x=mdd bacl2 +mdd h2so4-mbaso4=150+250-17,475=382,525g
=>mhcl=0,175.36,5=6,3875g=>C%=6,3875/382,525.100~1,670%
=>mh2so4 dư=0,175.98=17,15g=>C%=17,15/382,525.100~4,483%