Could you please answer BOTH questions 1 and 2? Thank you! The value of K_C for

Question

Could you please answer BOTH questions 1 and 2? Thank you!

The value of K_C for the reaction of hydrofloric acid in water to make the aqueous hydronium ion and aqueous Marks: 1 fluoride ion is 0.00001677. The concentration of HF(aq) is 1.2078 M with no products. What is the equilibrium concentration (in M) of the hydronium ion? The value of K_c for the reaction of phosphorus pentachloride to make phosphorus trichloride and chlorine is 1.7564. The concentration of phosphorus pentachloride 1.17267 M with no products. What is the equilibrium concentration (in M) of chlorine?

Explanation / Answer

1)

concentration of HF = 1.2078 M

HF (aq)   +   H2O (l)   ----------------> F- (aq) + H3O+ (aq)

1.2078                                                0                   0

1.2078 - x                                           x                      x

Ka = x^2 / 1.2078 - x

1.677x10^-5 = x^2 / 1.2078 - x

x = 4.4922 x 10^-3

[H3O+] = 4.4922 x 10^-3 M

conentration of hydronium ion = 4.4922 x 10^-3 M

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

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