You can use scientific notation using "e". Example: 0.0010 = 1.0e-3 Primary Standard Used: Na2C03 Formula Mass of 1° standard: 105.99 g/mol %purity of 1° standard: 95% Trial 1 3 1° Standard weight, g 0.1005 0.1001 0.0997 Net volume of HCI, ml 9.30 9.00 8.90 M HCI Average M HCI Determination of Ksp and Solubility of Ca(OH)2 Answer the concentrations, solubility and Ksp in 3 significant figure. You can use scientific notation using "e". Example: 0.0010 = 1.0e-3 Trial 2 3 Volume of filtrate (mL) 50 50 50 Net volume of HCI, ml 11.2 11.2 11.4 [OH-1, M [Ca 2+), M Solubility of Ca(OH)2 Ksp of Ca(OH)2 Average solubility Average Ksp Theoretical Ksp 5.50e-6 % error
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Standardization of 0.10 M HCl
1. Take three (3) clean and properly labeled 250-mL Erlenmeyer flasks. Into the three flasks, weigh 0.1 g of
the primary standard Na2CO3 to the nearest 0.1 mg. Record the weights of the primary standard.
2. Add about 75.0 mL of boiled distilled water and swirl to dissolve the solids.
3. Add 2 to 3 drops of phenolphthalein indicator. Record the initial burette reading and titrate with the
prepared 0.10 M HCl solution until phenolphthalein endpoint.
4. Record the final burette reading for each titration in your data sheet
Determination of Ksp and Molar Solubility
1. Add Ca(OH)2 to 250.0 mL distilled water with stirring until equilibrium is achieved.
2. Filter the undissolved precipitate. Measure out 50.0 mL of the supernate into a 250-mL Erlenmeyer flask
using a pipette.
3. Add a few drops of phenolphthalein indicator and titrate with standardized HCl solution until endpoint
is achieved.
4. Record the volume the HCl solution used. Perform two more trials.
![You can use scientific notation using "e". Example: 0.0010 = 1.0e-3
Primary Standard Used: Na2C03
Formula Mass of 1° standard: 105.99 g/mol
%purity of 1° standard: 95%
Trial
1
2
1° Standard weight, g
0.1005
0.1001
0.0997
Net volume of HCI, mL
9.30
9.00
8.90
M HCI
Average M HCI
Determination of Ksp and Solubility of Ca(OH)2
Answer the concentrations, solubility and Ksp in 3 significant figure.
You can use scientific notation using "e". Example: 0.0010 = 1.0e-3
Trial
1
2
3
Volume of filtrate (mL)
50
50
50
Net volume of HCI, mL
11.2
11.2
11.4
[OH-], M
[Ca 2+), M
Solubility of Ca(OH)2
Ksp of Ca(OH)2
Average solubility
Average Ksp
Theoretical Ksp
5.50e-6
% error](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F55815ef3-1f3f-422e-b33b-6261d3029e90%2F6819d332-fbe4-4a3f-ac04-6ed850aa5547%2Fig1o4el_processed.jpeg&w=3840&q=75)
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