Đặt nNaOH = x (mol); nKOH = y (mol); ( x, y > 0 )
NaOH + HCl \(\rightarrow\) NaCl + H2O (1)
KOH + HCl \(\rightarrow\) KCl + H2O (2)
Từ (1)(2) ta có hệ pt
\(\left\{{}\begin{matrix}40x+56y=12,4\\58,5x+74,5y=17,025\end{matrix}\right.\)
\(\Rightarrow\) \(\left\{{}\begin{matrix}x=0,1\\y=0,15\end{matrix}\right.\)
\(\Rightarrow\) mNaCl = 0,1.58,5 = 5,85 (g)
\(\Rightarrow\) mKCl = 0,15.74,5 = 11,175 (g)