ssolve 14.7 grams of sodium hydroxide pellets in 100 ml of carbon-dioxide free water. ool the solution to room temperature dd a freshly prepared saturated solution of barium hydroxide until no more precipitate forms. ake and filter. ansfer it in a 250 ml volumetric flask, then add sufficient quantity of carbon dioxide free water to ake 250 ml. dization eigh accurately about 5 grams of potassium biphthalate, previously crushed lightly and dried a 20 degrees Celsius for 2 hours and dissolve it in 75 ml of carbon dioxide free water. dd 2 drops of phenolphthalein TS. ansfer 50 ml of the sodium hydroxide solution in a Buret and fitrate the potassium biphthal lution with the sodium hydroxide solution until it produces a permanent pink color. ote: 24 ml NaOH solution was used to change the color from colorless to pink color e: Each ml of 1 N NaOH is equivalent to 204 mg of Potassium biphthalate Data Wt of KHP (g) MW of KHP meg of KHP e of sodium hydroxide solution used (ml) Trial 1 5.000 g 24.000

Organic Chemistry
8th Edition
ISBN:9781305580350
Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote
Chapter4: Acids And Bases
Section: Chapter Questions
Problem 4.43AP
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Based from the given problem, What is the Normality of the sodium hydroxide solution?

Part 1: Alkalimetry
Preparation and Standardization of 1N Sodium Hydroxide
A. Preparation
Dissolve 14.7 grams of sodium hydroxide pellets in 100 ml of carbon-dioxide free water.
Cool the solution to room temperature
Add a freshly prepared saturated solution of barium hydroxide until no more precipitate forms.
Shake and filter.
Transfer it in a 250 ml volumetric flask, then add sufficient quantity of carbon dioxide free water to
make 250 ml.
B. Standardization
Weigh accurately about 5 grams of potassium biphthalate, previously crushed lightly and dried at
120 degrees Celsius for 2 hours and dissolve it in 75 ml of carbon dioxide free water.
Add 2 drops of phenolphthalein TS.
Transfer 50 ml of the sodium hydroxide solution in a Buret and titrate the potassium biphthalate
solution with the sodium hydroxide solution until it produces a permanent pink color.
Note: 24 ml NaOH solution was used to change the color from colorless to pink color
*Titer Value: Each ml of 1 N NaOH is equivalent to 204 mg of Potassium biphthalate
Table:
Data
Wt of KHP (g)
MW of KHP
meg of KHP
Volume of sodium hydroxide solution used (ml)
Normality
Trial 1
5.000 g
24.000
Transcribed Image Text:Part 1: Alkalimetry Preparation and Standardization of 1N Sodium Hydroxide A. Preparation Dissolve 14.7 grams of sodium hydroxide pellets in 100 ml of carbon-dioxide free water. Cool the solution to room temperature Add a freshly prepared saturated solution of barium hydroxide until no more precipitate forms. Shake and filter. Transfer it in a 250 ml volumetric flask, then add sufficient quantity of carbon dioxide free water to make 250 ml. B. Standardization Weigh accurately about 5 grams of potassium biphthalate, previously crushed lightly and dried at 120 degrees Celsius for 2 hours and dissolve it in 75 ml of carbon dioxide free water. Add 2 drops of phenolphthalein TS. Transfer 50 ml of the sodium hydroxide solution in a Buret and titrate the potassium biphthalate solution with the sodium hydroxide solution until it produces a permanent pink color. Note: 24 ml NaOH solution was used to change the color from colorless to pink color *Titer Value: Each ml of 1 N NaOH is equivalent to 204 mg of Potassium biphthalate Table: Data Wt of KHP (g) MW of KHP meg of KHP Volume of sodium hydroxide solution used (ml) Normality Trial 1 5.000 g 24.000
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