A solution containing 10. mmol of CO₃^2- and 5.0 mmol of HCO₃^- is titrated with
1) 0 M HCl.What volume of HCl must be added to reach the first equivalence point?

Question

Quizplus · Accepted Answer

The balanced chemical equation for the reaction between CO₃^2- and HCO₃^- is: CO₃^2- + HCO₃^- -> CO₃^- + H2O + H2S From the balanced equation, it can be seen that 1 mole of HCO₃^- reacts with 1 mole of CO₃^2-, i.e., the stoichiometric ratio of the two reactants is 1:1. Therefore, to reach the first equivalence point, it would require the complete neutralization of the HCO₃^- present in the solution. Since the initial concentration of HCO₃^- is 5.0 mmol, the total number of moles of HCl required to neutralize it would also be 5.0 mmol. The concentration of the HCl solution is given as 0 M, which means that the volume of HCl required can be calculated as follows: Volume of HCl = (Number of moles of HCl required) / (Concentration of HCl) Volume of HCl = (5.0 mmol) / (0 M) = ∞ mL This implies that an infinite volume of 0 M HCl would be required to reach the first equivalence point, which is not possible. Therefore, the given question does not have a valid answer and should be reviewed.

A Solution Containing 10