Ta có
NaOH + HCl \(\rightarrow\) NaCl + H2O
x..............x.............x.........x
KOH + HCl \(\rightarrow\) KCl + H2O
y.............y...........y.........y
=> \(\left\{{}\begin{matrix}40x+56y=6,08\\58,5x+74,5y=8,3\end{matrix}\right.\)
=> \(\left\{{}\begin{matrix}x=0,04\\y=0,08\end{matrix}\right.\)
=> mHCl = ( 0,04 + 0,08 ) . 36,5 = 4,38 ( gam )
=> mNaCl = 58,5 . 0,04 = 2,34 ( gam )
=> mKOH = 6,08 - 2,34 = 3,74 ( gam )