Calculate the theoretical pH after 2.50 mL and 9.50 mL of NaOH has been added in both the
titration of HCl and of HC2H3O2. Indicate if the volume of NaOH is before or after the
equivalence point.
i don't know where to start.
with an ICE chart.
To calculate the theoretical pH after adding NaOH in both the titration of HCl and HC2H3O2, you need to consider the neutralization reactions involved.
1. For the titration of HCl:
The titration of HCl with NaOH results in the formation of water and a salt.
HCl(aq) + NaOH(aq) -> H2O(l) + NaCl(aq)
Since NaCl is a strong electrolyte, it dissociates completely in water to produce Na+ and Cl- ions. Therefore, the solution becomes a neutral solution at the equivalence point because all H+ ions from HCl react with OH- ions from NaOH to form water.
Before the equivalence point (before 2.50 mL NaOH), the solution contains excess HCl, so the pH is acidic. You can calculate the pH by using the concentration of HCl and considering the volume of the solution.
After the equivalence point (after 2.50 mL NaOH), the solution contains excess NaOH, which makes it basic. To calculate the pH, you need to determine the concentration of NaOH remaining in the solution and take into account the total volume after the addition of NaOH (2.50 mL + 9.50 mL = 12.00 mL).
2. For the titration of HC2H3O2 (acetic acid):
Acetic acid (HC2H3O2) is a weak acid, and its neutralization reaction with NaOH proceeds differently compared to HCl.
HC2H3O2(aq) + NaOH(aq) -> H2O(l) + NaC2H3O2(aq)
The salt formed, NaC2H3O2, is the sodium acetate. Sodium acetate is a weak electrolyte and partially dissociates in water, resulting in the release of C2H3O2- ions. These ions react with water to form acetic acid and hydroxide ions.
Before the equivalence point (before 9.50 mL NaOH), the solution contains excess acetic acid. In this case, you need to consider the concentration of acetic acid and the volume of the solution to calculate the pH.
After the equivalence point (after 9.50 mL NaOH), the solution contains excess NaOH, making it basic. To calculate the pH, you need to determine the concentration of NaOH remaining in the solution and consider the total volume after the addition of NaOH (2.50 mL + 9.50 mL = 12.00 mL).
Overall, to calculate the theoretical pH in both cases, you need to consider the concentration and volumes of the solutions involved, as well as the nature of the acids and bases.