\(\text{a) NaOH + HCl }\rightarrow\text{ NaCl + H2O}\)
1,25_______1,25_____________________(mol)
\(\text{nHCl = CM . V = 1,25 .1 = 1.25 (mol)}\)
Theo PT nNaCl =nHCl = 1.25 (mol)
mNaOH = n.M = 1,25 . 40 = 50 (g)
C%NaOH = (mct/mdd).100%= (50/25).100%= 200%
b) Lập hpt giải