The concentration of fluoride ions in a saturated solution of barium fluoride is

Question

The concentration of fluoride ions in a saturated solution of barium fluoride is_____M. The solubility product constant of BaF_2 is 1.7 times 10^-6. A) 3.8 times 10^-4 B) 1.4 times 10^-4 C) 3.0 times 10^-3 D) 7.5 times 10^-3 E) 1.5 times 10^-2 The solubility of lead (II) chloride (PbCl_2) is 1.6 times 10^-2 M. What is the K_Sp of PbCl_2? A) 3.1 times 10^-7 B) 1.6 times 10^-5 C) 1.6 times 10^-2 D) 5.0 times 10^-4 E) 4.1 times 10^-6 A 25.0 mL sample of 0.723 M HCIO_4 is titrated with a 0.27 M KOH solution. The H_3O^+ concentration after the addition of 80.0 mL of KOH is____M. A) 0.7 B) 4 times 10^-2 C) 0.4 D) 3 times 10^-13 E) 1 times 10^-7 The K_a of benzoic acid is 6.30 times 10^-5. The pH of a buffer prepared by combining 50.0 mL of 1.00 M potassium benzoate and 50.0 mL of 1.00 M benzoic acid is____. A) 0.851 B) 4.201 C) 1.705 D) 3.406 E) 2.383 K_a for HX is 7.5 times 10^-12. What is the pH of a 0.15 M aqueous solution of NaX? A) 7.97 B) 1.96 C) 12.10 D)8.04 E) 6.00

Explanation / Answer

Ans 4. E 1.5 × 10-2

BaF2 ---> Ba+2 + 2F-

ksp = x. (2x)2

ksp = 4x3

1.7 × 10-6 = 4x3

x = 0.75 ×10-2

concentration of flouride ions = 2x

= 2 × 0.0075

= 1.5 × 10-2 M

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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