Na2CO3 + 2HCl \( \to \) CO2\( \uparrow \) + H2O+ 2NaCl
1 mol 2 mol
\({n_{N{a_2}C{O_3}}} = \dfrac{{0,2544}}{{106}} = {2,4.10^{ - 3}}\) mol
\( \Rightarrow {n_{HCl}} = {2,4.10^{ - 3}}.2 = {4,8.10^{ - 3}}\) mol
Trong 30 ml dd HCl chứa 4,8.10-3 mol HCl
Trong 1000 ml dd HCl chứa \(\dfrac{{{{4,8.10}^{ - 3}}.1000}}{{30}}\) = 0,16 (mol)
\( \Rightarrow \) [HCl] = 0,16 mol/l