please explain and show work Solution a. 3.35 b. 5.62 c. 2.85 d.4.88 5- The foll

Question

please explain and show work

Solution a. 3.35 b. 5.62 c. 2.85 d.4.88 5- The following curve corresponds to the titration of diprotic acid with sodium hydroxide 1400 T 12.00 10.00 8.00 6.00 4 00 2.00 o.oo 0.00 0.00 500 10.00 15.00 20.00 2500 30.00 3500 40.00 45.00 50.00 Volume of NaOH (mL a.- Determine the 2 values of the pKa pKal a. 1.0 b.-3.0 c.-4.00 pKa2- a. 4.0 b. 10.0 c. 6.0 b.-Determine the pH and NaOH volume for both neutralizations points First neutralization pH- a. 6 b. 4.0 c. 6.0 Volume a. 21 b. 35 c. 15 second neutralization pH a. 12 b. 6 c. 8.8 Volume a. 42 b-70 c. 35

Explanation / Answer

5. Given above is the titration curve for diprotic acid with sodium hydroxide

at the neutralization points the curve is almost vertical

at half neutralization points, concentration of acid and conjugate base are equal and therefore, pH = pKa

a. Determination of the 2 pKa's

pKa1 b. 3.0

pKa2 = 6.0

b. Determination of pH and volume of NaOH at neutralization points (center of vertical parts of the curve)

first neutralization pH= b. 4.0 Volume a. 21

second neutralization pH= c. 8.8 Volume a. 42

at second neutralization, A^2- formed is hydrolyzed in water to produce OH-

A^2- + H2O <==> HA- + OH-

so pH > 7

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.