a) Ba(OH)2 + 2HCl --> BaCl2 + 2H2O
b) \(n_{Ba\left(OH\right)_2}=0,5.0,4=0,2\left(mol\right)\)
PTHH: Ba(OH)2 + 2HCl --> BaCl2 + 2H2O
0,2------>0,4----->0,2
=> \(V_{ddHCl}=\dfrac{0,4}{1,5}=\dfrac{4}{15}\left(l\right)\)
c) \(m_{BaCl_2}=0,2.208=41,6\left(g\right)\)
2HCl+Ba(OH)2->BaCl2+2H2O
0,4------0,2-----------0,2 mol
n Ba(OH)2=0,5.0,4=0,2 mol
=>VHCl=\(\dfrac{0,4}{1,5}\)=\(\dfrac{4}{15}l\)
=>m BaCl2=0,2.208=41,6g