west.cengagenow.com Multip Electrolyti... webfronter... Detailed W... Cengage On

Question

west.cengagenow.com Multip Electrolyti... webfronter... Detailed W... Cengage Online t. it Stu... Homework- Electrochemistry Review Topics] Use the References to access important values if needed for this question. 2. Reduction 3. Reduction A voltaic cell is constructed in which the cathode is a standard hydrogen electrode and the anode is a hydrogen electrode (P(H2atm) immersed in a solution of unknown H. If the cell potential is 0.226 V, what is the pH of the unknown solution at 298 K? 4. Calculate 5. Calculate 6. Calculate pH- 7. Nernst: Ec 8. Nernst: Co. Submit Answer Retry Entire Group

Explanation / Answer

Nernest equation,

E0cell = 0 v

cell reaction: H2(g) + 2H^+(aq) ---> 2H^+(aq) + H2(g)

E0cell = 0 V

   Ecell = E0cell - 0.0591/nlog[[H+]^2*pH2/[H+]^2*pH2]

        0.226 = 0 - (0.0591/2)ln(x^2*1/(1^2*1))

    x = [H3O+] = [H+] = 0.0218 M

pH = -log[H3O+]

    = -log0.0218

    = 1.66

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

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