Question

Dilute hydrochloric acid, HCl(aq), reacts with aqueous sodium carbonate, Na2CO3(aq).
The chemical equation for the reaction is shown.
2HCl + Na2CO3 → 2NaCl + CO2 + H2O
A 25.0cm3 portion of Na2CO3(aq) was placed in a conical flask with a few drops of a suitable indicator. It was titrated against HCl(aq) of concentration 0.180 mol /dm3.
20.0cm3 of HCl(aq) was required to reach the end-point.
Calculate the concentration of the Na2CO3(aq), in mol /dm3, using the following steps.
Calculate the number of moles of HCl used in the titration.

Answer 1

Answer:

I don't know its so difficult

if anybody know it so

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