Calculate the concentration of the hydrochloric acid if a $20\mathrm{.}00mL$ sample is titrated with standard sodium carbonate solution.

$2HCl(aq)+N{a}_{2}C{O}_3(aq)H_{2}O(l)+C{O}_2(g)+2$NaCl$(aq)$

The titration required $10\mathrm{.}00mL$ of $0\mathrm{.}250mo\frac{l}{L}$ sodium carbonate to neutralize the acid.