Theo đề bài ta có:
\(n_{MgCO_3}=n_{CaCO_3}=n_{BaCO_3}=x\left(mol\right)\)
\(\Rightarrow n_{HCl}=\left(2+2+2\right)x=6x\left(mol\right)\)
\(MgCO_3+2HCl\rightarrow MgCl_2+H_2O+CO_2\)
\(CaCO_3+2HCl\rightarrow CaCl_2+H_2O+CO_2\)
\(BaCO_3+2HCl\rightarrow BaCl_2+H_2O+CO_2\)
\(pt:84x+100x+197x=19,05\\ \Leftrightarrow x=0,05\left(mol\right)\\ \Rightarrow V_{HCl}=\frac{n}{C_M}=\frac{6x}{2}=0,15\left(l\right)\)
Đặt :
nMgCO3 = nCaCO3 = nBaCO3 = x mol
<=> 84x + 100x + 197x = 19.05
=> x = 0.05 mol
nHCl = 2nhh = 0.05*2 = 0.1 mol
VddHCl = 0.1/2 = 0.05 (l)