Ksp Report Sheet Name Ksp of Calcium Hydroxide Report Sheet Part A: 1035 Molarit

Question

Ksp Report Sheet

Name Ksp of Calcium Hydroxide Report Sheet Part A: 1035 Molarity of Standard NaOH Volume of Standard NaOH25 m Trial 1 Trial 2 Trial 3 Final Buret Readin Initial Buret Readin Volume of HCl used Trial 1 2.59 2.59 098 Trial 2 2.59 2.59 098 Trial 3 NA mmoles NaOH in sample mmoles HCl used Molarity HCl (mmol HCI/ml HC NA Average HCI Molarity Show calculation of molarity for Tria1 here: Part B: Average HCl Molarity Volume of filtrate used 098 (from above) Trial 1 Trial 2 11.67 Trial 3 NA Final Buret Readin Initial Buret Readin Volume of HCl used 11.65 11.65 11.67 NA

Explanation / Answer

2. Ksp for Ca(OH)2 = 5.5 x 10^-6

with

[OH-] = 0.1 M

solubility of Ca(OH)2 in solution is,

solubility = [Ca2+] = Ksp/[OH-]^2 = 5.5 x 10^-6/(0.1)^2 = 5.5 x 10^-4 M

3. Mg(OH)2 solubility in pure water

Ksp = [Mg2+][OH-]^2

let x amount of salt is in solution

5 x 10^-11 = (x)(2x)^2

solubility = x = 2.32 x 10^-4 M

the solubility of Mg(OH)2 is much lower in pure water as compared to Ca(OH)2 in pure water and this would thus lead to large amounts of error in meaurement of Ksp. Thus the same method can not be used for Mg(OH)2.

4. Ksp for Cr(OH)3 = [Cr3+][OH-]^3

with,

[Cr3+] = 4 x 10^-6 M

[OH-] = 3 x 4 x 10^-6 = 1.2 x 10^-5 M

Ksp = (4 x 10^-6)(1.2 x 10^-5)^3 = 6.912 x 10^-21

Related Questions

Navigate

• Browse (All)
• Browse K
• Subjects

---

---

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