Which of the following equilibria will be affected by changes in container volum

Question

Which of the following equilibria will be affected by changes in container volume? i only b. ii only c. i and ii d. ii and iii e. i, ii. and iii 12. Consider the equilibrium: 2NH_3 (g) N_2 (g) + 3H_2 (g) DeltaHdegree = 46.1 kJ at 298K Which one of the following disturbances will cause the equilibrium to shift to the right? a. Increasing the temperature b. Adding a catalyst c. Increasing the partial pressure of N_2 d. Removing NH_3 e. Decreasing the container volume 13. Which of the following pairs of species is not a conjugate acid-base pair? a. H_2S, S^-2 b. HNO_2, NO_2- c. OH O_2 d. HSO_4-,so_42 e. H_2C0_3, HCO_3- 14. What is the pH of 0.023 M HCN (aq)? (K_a = 4.9 x 1O^1) a. 1.64 b. 10.95 c. 3.05 d. 5.47 e. 4.97 15. Which of the following reactions is associated with the definition of K_

Explanation / Answer

11. All of the following will change/be affected if the volume of the container is changed.

12. Adding of catalyst

13. A

14. You calculate [H+] using the Ka value Let the acid be called HA
Ka = [H+]*[A-] / [HA]
Now we assume ( quite safely) that
[H+] = [A-]
[HA] = 0.0.023
Substitute in equation, and solve for [H+]

Ka = [H+]² / 0.023
(4.9*10^-10) * 0.023 = [H+]²
[H+]² = 1.127*10^-11
[H+] = 3.357*10^-6 M

pH = -log (3.357*10^-6)
pH = 5.47

15. E

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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