a/ \(H_2SO_{\text{4}}\left(0,13\right)+2KOH\left(0,26\right)\rightarrow K_2SO_4+2H_2O\)
\(H_2SO_4\left(0,02\right)+Ba\left(OH\right)_2\left(0,02\right)\rightarrow BaSO_4+2H_2O\)
b/ Ta có:
\(n_{H_2SO_4}=0,15.1=0,15\left(mol\right)\)
\(n_{Ba\left(OH\right)_2}=0,05.0,4=0,02\left(mol\right)\)
\(\Rightarrow n_{H_2SO_4\left(1\right)}=0,15-0,02=0,13\left(mol\right)\)
\(\Rightarrow CM_{KOH}=\dfrac{0,13}{0,08}=1,625\left(M\right)\)
H2SO4 + 2KOH \(\rightarrow\)K2SO4 + 2H2O (1)
H2SO4 + Ba(OH)2 \(\rightarrow\)BaSO4 + 2H2O (2)
nH2SO4=0,15.1=0,15(mol)
nBa(OH)2=0,05.0,4=0,02(mol)
Theo PTHH 2 ta có:
nBa(OH)2=nH2SO4=0,02(mol)
=>nH2SO4 ở (1)=015-0,02=0,13(mol)
Theo PTHH 1 ta có:
2nH2SO4=nKOH=0,26(mol)
CM dd KOH=\(\dfrac{0,26}{0,08}=3,25M\)