CHM 222 / 224 Practice Exam (Ch 14-17) r Name f. Predict whether the reaction wi

Question

CHM 222 / 224 Practice Exam (Ch 14-17) r Name f. Predict whether the reaction will shift left, shift right, or remain unchanged after each i. CO2 is added to the reaction. il, H2O is removed from the reaction. ill. The volume of is decreased v. If the reaction is endothermic and the temperature is Complete the the reaction HOO (aq) + Hon-H50() CO-(aq + 6. a. Complete the table. Acid Conjugate Base Acid Base b. If the pH of the solution is 3.25. Find the K, for the acid. [HCIO] 1.2 M (Chedk example 16.8) c. Calculate the Percent lonization. (Check example 16.9)

Explanation / Answer

a) HClO(aq) + H2O(l) <-------------> ClO-(aq) + H3O+(aq)

acid base conjugate base conjugate acid

b) Given pH = 3.25

C = 1.2M

We know pH of a weak acid is given by

pH = 1/2 [pKa -logC]

3.25 = 1/2 [pka -log 1.2]

Thus pKa = 6.5791

and Ka = 2.635 x10-7

C) For a weak acid the degree of ionisation is given as

degree of ionisation = (Ka /C)1/2

= (2.635 x10-7 /1.2)1/2

= 4.686x10-2

Percent ionisation = degree of ionisation x100

= 4.686x10-2 x100

= 4.686%

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

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