A Solution Containing 10

Multiple Choice

A solution containing 10.mmol of CO₃^2-and 5.0 mmol of HCO₃^-is titrated with 1.2 M HCl.What volume of HCl must be added to reach the first equivalence point? (1 mmol = 0.001 mol)

A) 23.3 mL
B) 4.2 mL
C) 8.3 mL
D) 18.3 mL
E) 13.3 mL