(8pts) Molar Solubility And Determination Of Solubility Product
Your data should be recorded and analyzed using the provided Excel file: Excel Template
pH Paper Data
pH of saturated solution using pH paper (based on color guide) 11.5pH Electrode Data
pH of diluted solution determined with pH electrode 10.47PASCO Drop Counter Titration Data
Data from PASCO Drop Counter Titration
Enter your measurements from lab with the correct number of significant figures
Measurement | |
|---|---|
Volume of Ca(OH)2 solution (L) | 0.025 |
Concentration of HCl (mol/L) | 0.02 |
The rest of your measurements for this part of the experiment will be entered later.
Titration with Indicator Data
Data from Titration with Indicator
Enter your measurements from lab with the correct number of significant figures
Measurements | |
|---|---|
Volume of Ca(OH)2 solution (L) | 0.025 |
Concentration of HCl (mol/L) | 0.02 |
Initial volume of HCl (mL) | 50.00 |
Final volume of HCl (mL) | 21.50 |
Attendance
This QR code needs to be scanned by your TA to confirm that you have completed data collection and cleaned up your workspace.
(52pts) Calculations and Results
Solubility Product Using pH Paper
Calculations from pH paper
Complete the following calculations taking into account correct significant figrues
Calculations | |
|---|---|
pH based on color guide | 11.5 |
H+ concentration | |
OH- concentration | |
Ksp for Ca(OH)2 |
Solubility Product Using pH Electrode
Calculations from pH electrode
Complete the following calculations taking into account correct significant figrues
Calculations | |
|---|---|
pH of diluted solution | 10.47 |
H+ concentration in diluted solution | |
H+ concentration in concentrated solution | |
OH- concentration in concentrated solution | |
Ksp for Ca(OH)2 |
Calculations from PASCO Drop Counter Titration
Complete the following calculations taking into account correct significant figures
Calculations | |
|---|---|
Volume of Ca(OH)2 solution (L) | 0.02500 |
Concentration of HCl (mol/L) | 0.02 |
Volume of HCl at equivalence point (mL) | |
Volume of HCl at equivalence point (L) | |
Moles of HCl used (mol) | |
Moles of OH- (mol) | |
OH- concentration (M) | |
Ksp for Ca(OH)2 |
Solubility Product by Titration with Indicator
Calculations from Titration with Indicator
Complete the following calculations taking into account correct significant figures
Calculations | |
|---|---|
Volume of Ca(OH)2 solution (L) | 0.02500 |
Concentration of HCl (mol/L) | 0.02 |
Initial volume of HCl (mL) | 50.00 |
Final volume of HCl (mL) | 21.50 |
Volume of HCl added (mL) | |
Volume of HCl added (L) | |
Moles of HCl used (mol) | |
Moles of OH- (mol) | |
OH- concentration (M) | |
Ksp for Ca(OH)2 |
(25pts) Post Lab Question
The literature value for the Ksp of calcium hydroxide in water is 6.5 x 10^-6.(25pts)
1. Please answer in at least 1000 words total, the following prompts
*Compare the accuracy of all four methods to determine the value for Ksp.
*Discuss which method was the most difficult to complete.
*Discuss which method was the easiest to complete.
*If you need to know the hydroxide ion concentration of an aqueous solution with legal ramifications, which method would be the best method to use to ensure accuracy without any reasonable doubt.