Lab NaOH - 2, Glass stirring rods 3. Graduated cylinder...

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Date: September 27, 2010 Title: Standardization of a Base, NaOH Purpose: The purpose of this experiment is to determine the molarity of a sodium hydroxide solution. This experiment is useful in real-life applications for obtaining the volume or concentration of a solution. In some encounters like NaOH, we might not be able to find its mass directly due to the fact that it is constantly absorbing water from the air. Hypothesis: The hypothesis is that the concentration of the sodium hydroxide can be found through the titration of it with an acid. The molarity of a base or an acid can be obtained by the formula M 1 V 1 = M 2 V 2, M representing molarity and V representing volume. Once the determined volume of NaOH needed is known, the molarity through the formula can directly be obtained. Materials: Chemicals 1. 0.1 M H 2 C 2 O 4 * H 2 O (3.15 g) 2. Unknown molarity NaOH (0.99 g) 3. Distilled water (500 ml) 4. Phenolphthalein (indicator) Lab Equipments 1. Digital balance (0.01 g precision) 2.
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Unformatted text preview: 2, Glass stirring rods 3. Graduated cylinder (250 ml) 4. Ring stand 5. Spatula 6. Watch glass 7. 2, Flask (250 ml) 8. Buret (0.1 ml precision) 9. 2, Beakers (50ml) Procedures: 1. Mass out 3.15 g of H 2 C 2 O 4 * H 2 O and put it into a flask. 2. Add 250 ml of distilled water to dilute the solution. 3. Mass out 0.99 g of NaOH and put it into another flask. 4. Add 250 ml of distilled water to dilute the solution. 5. Stir the NaOH solution until all the solid compound has dissolved. 6. Prepare a buret by rinsing it with distilled water followed by 10 ml of NaOH solution. 7. Connect the buret to the ring stand. 8. Add 50 ml of the NaOH solution into the buret. 9. Place the flask containing the H 2 C 2 O 4 * H 2 O under the buret. 10. Add two drops of Phenolphthalein to indicate the end point. 11. Constantly swirl the flask as the NaOH drips into the flask. 12. Stop the titration and read the buret when you reach its end point....
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This note was uploaded on 02/20/2011 for the course CHEM 121 taught by Professor John during the Spring '11 term at Caldwell College.

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Lab NaOH - 2, Glass stirring rods 3. Graduated cylinder...

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