Quantitative Determination of the Acidity of Softdrinks
Marz Jhon V. Patricio
QUANTITATIVE DETERMINATION OF THE ACIDITY OF SOFT DRINKS
I. Introduction
A. Principle
Titration is a laboratory method that is the slow addition of one solution to another until the reaction reaches neutralization, which is often indicated by color change. Acid-base titration is the most frequently used procedure to determine the concentration of an acid or basic solution. This titration is also called as neutralization reaction. By adding an indicator to the solution, we will able to detect when the reaction between acid and the base is complete.
Soft drink is a beverage that is non-alcoholic, carbonated drinks that contains many ingredients such as sweetener, flavoring, carbonated water and others. As the carbon dioxide is dissolved, it gives the soft drink a distinctive taste and texture. Small amounts of alcohol may be present in a soft drink, but the alcohol content must be less than 0.5% of the total volume. It only has an amount of acid like carbonic acid (H2CO3), citric acid (HC6H8O7) and phosphoric acid (H3PO4).
B. Objectives
At the end of this exercise, you must be able to:
Prepare and standardize a solution of Sodium hydroxide solution
Determine the acidity of the two soft drink samples using the standardized solution
Perform the right titration techniques
II. Materials
A. Reagents
Sodium hydroxide (NaOH) pellets Potassium acid phthalate (HKC8H4O4)
Phenolphthalein Soft drinks samples
B. Apparatus
250-ml beaker 250-ml Erlenmeyer flask 100-ml volumetric flask
50-ml buret 10-ml pipet buret holder
Stirring rod triple beam balance Bunsen burner
Iron stand and ring wire gauze
III. Schematic diagram of the procedure
IV. Data and Observations
Table 1.1. Preparation of the Sodium hydroxide solution
Mass before standing
Mass after standing
Beaker (g)
beaker and NaOH pellets(g)
Mass of NaOH pellets (g)
Table 1.2. Standardization of the NaOH solution
TRIAL I
TRIAL II
Mass of potassium acid phthalate (g)
Initial
QUANTITATIVE DETERMINATION OF THE ACIDITY OF SOFT DRINKS
I. Introduction
A. Principle
Titration is a laboratory method that is the slow addition of one solution to another until the reaction reaches neutralization, which is often indicated by color change. Acid-base titration is the most frequently used procedure to determine the concentration of an acid or basic solution. This titration is also called as neutralization reaction. By adding an indicator to the solution, we will able to detect when the reaction between acid and the base is complete.
Soft drink is a beverage that is non-alcoholic, carbonated drinks that contains many ingredients such as sweetener, flavoring, carbonated water and others. As the carbon dioxide is dissolved, it gives the soft drink a distinctive taste and texture. Small amounts of alcohol may be present in a soft drink, but the alcohol content must be less than 0.5% of the total volume. It only has an amount of acid like carbonic acid (H2CO3), citric acid (HC6H8O7) and phosphoric acid (H3PO4).
B. Objectives
At the end of this exercise, you must be able to:
Prepare and standardize a solution of Sodium hydroxide solution
Determine the acidity of the two soft drink samples using the standardized solution
Perform the right titration techniques
II. Materials
A. Reagents
Sodium hydroxide (NaOH) pellets Potassium acid phthalate (HKC8H4O4)
Phenolphthalein Soft drinks samples
B. Apparatus
250-ml beaker 250-ml Erlenmeyer flask 100-ml volumetric flask
50-ml buret 10-ml pipet buret holder
Stirring rod triple beam balance Bunsen burner
Iron stand and ring wire gauze
III. Schematic diagram of the procedure
IV. Data and Observations
Table 1.1. Preparation of the Sodium hydroxide solution
Mass before standing
Mass after standing
Beaker (g)
beaker and NaOH pellets(g)
Mass of NaOH pellets (g)
Table 1.2. Standardization of the NaOH solution
TRIAL I
TRIAL II
Mass of potassium acid phthalate (g)
Initial