A hydrochloric acid solution is standardized by titrating  0.2329 of primary standard Na2CO3 (105.96) to a methyl red end  point by boiling the carbonate solution near the end point to  remove the carbon dioxide. If 42.87 ml acid is required for the  titration, what is its molarity?

An aqueous solution of hydrochloric acid is standardized by titration with a 0.183 M solution of calcium hydroxide.

If 25.0 mL of base are required to neutralize 20.0 mL of the acid, what is the molarity of the hydrochloric acid solution?

Near the endpoint of the Na₂CO₃-HCl titration, it is necessary to heat the analyte solution almost to boiling to remove the _____ produced by the titration reaction.

a. bicarbonate ion
b. water
c. carbon dioxide
d. sodium chloride