How many liters (L) of a 0.1154 M aqueous HCl solution is required to reach the first equivalence point of 0.1136 moles of Na2CO3?

Question

How many liters (L) of a 0.1154 M aqueous HCl solution is required to reach the first equivalence point of 0.1136 moles of Na2CO3?

Answer 1

The first equivalence point would be represented by the following equilibrium:

Na₂CO₃ + HCl <==> NaHCO₃ + NaCl

mols Na₂CO₃ present = 0.1136 mols

mols HCl needed for 1st equivalence point = 0.1136 mols HCl

Liters of HCl needed:

0.1136 mols x 1 L / 0.1154 mols = 0.984 L