[mkfrimpong]

Depending on the indicator chosen in the titration of a known concentration of of Na₂CO₃ against dilute HCl, the following equations can be used to calculate the molarity of the acid:

1) Na₂CO_3(aq) + 2HCl_(aq) 2NaCl_(aq) + H₂O_(l) + CO_2(g)

2) Na₂CO_3(aq) +2HCl_(aq)  NaCl_(aq) + NaHCO_3(aq)


Explain why the two different equations can be used for the calculation of the molarity of the acid.

[Hunter2]

Show your own attempt first.
PS: Second equation is wrong