Molar Solubility and Solubility Product of Calcium Hydroxide Volume of saturated

Question

Molar Solubility and Solubility Product of Calcium Hydroxide Volume of saturated Ca(OH)2 solution (mL) 25.00 Molar concentration of standard HCI solution (mol/L.) 0.0480 Buret reading, initial (mL) 1.70 Buret reading, final (mL) 13.90 Volume of HCI added (mL) Moles of HCI added (mol) Show calculation Moles of OH^- in saturated solution (mol) Show calculation [OH^-), equilibrium (mol/L) Show calculation. [Ca^2+], equilibrium (mol/L) Show calculation. Molar solubility of Ca(OH)2 (mol/L) Show calculation. Ks rho of Ca(OH)2 Show calculation. For Trials 2 and 3. the Ks rho of Ca(OH)2 was. 5.2 X 10^-6 and 4.8 times 10^6 respectively. What is the average of Ks rho Ca(OH)2? What are the standard deviation and the relative standard deviation(%RSD) for the Ks rho of Ca(OH)2? Molor Solubility, Common-ion Effect

Explanation / Answer

Determine moles of HCl used:

moles HCl = (0.0480 mol / L) (0.0122 L) = 0.0005856 mol

2) Determine moles Ca(OH)2 titrated:

0.0005856 mol / 2 = 0.0002928 mol

Remember, every one Ca(OH)2 titrated requires 2 H+

3) Convert moles Ca(OH)2 to grams Ca(OH)2:

0.0002928 mol times 74.0918 g/mol = 0.02169 g

This is grams per 25.0 mL

3) Convert to grams per liter:

0.02169 g / 0.0250 L = 0.8676 g/L

1) 0.0002928 mol of Ca(OH)2 in 25.0 mL means:

[Ca2+] = 0.0002928 mol / 0.0250 L = 0.011712 M
[OH¯] = 0.002342 M times 2 = 0.023424 M

2) Calculate the Ksp:

Ksp = (0.011712) (0.023424 )2 = 6.4x 10¯5

Related Questions

Navigate

• Browse (All)
• Browse M
• Subjects

---

---

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