Cold Drinks Case Study

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The era of cold drinks began in 1952 but the industrialization in India marked its beginning with launching of Limca and Goldspot by parley group of companies. Since the beginning of cold drinks was highly profitable and luring, many multinational companies launched their brands in India like Pepsi and Coke. Cold drinks of different brands are composed of alcohol, carbohydrates, carbon dioxide, phosphate ions etc. These soft drinks give feeling of warmth, lightness and have a tangy taste, which is liked by everyone. Carbon dioxide is responsible for the formation of froth on shaking the bottle. The carbon dioxide gas is dissolved in water to form carbonic acid, which is also responsible for the tangy taste. Carbohydrates are the naturally …show more content…

The lime water turned milky. Observations:
Sr. No.
Name of drink
Time taken (s)
Inference
1.
Coca Cola

2.
Sprite

3.
Fanta

Inference:
All the soft drinks contain dissolved carbon dioxide in water. The carbon dioxide (CO2) dissolves in water to form carbonic acid, which is responsible for its tangy taste.
Chemical Reaction: Ca(OH)2 (s) + CO2 (g) → CaCO3 (s) + H2O(l) Experiment 3: Test for Glucose Small samples of cold drinks of different brands were taken in a test tube and a few drops of Benedict’s reagent were added. Benedict’s reagent is a solution of Sodium Citrate, Sodium Carbonate and Copper Sulphate. The test tube was heated for few seconds. Formation of reddish color confirmed the presence of glucose in cold drinks. Observations:
Sr. No.
Name of drink
Observation
Inference
1.
Coca Cola

2.
Sprite

3.
Fanta

Inference:
All the samples gave positive test for glucose with Benedict’s reagent. Hence all the drinks contain glucose.

Experiment 4: Test for …show more content…

Hence all the cold drinks contain phosphate. Experiment 5: Test for Alcohol Small samples of each brand of cold drinks were taken in separate test tubes and Iodine followed by Potassium Iodide and Sodium Hydroxide (NaOH) solution was added to each test tube. Then the test tubes were heated in hot water bath for 30 minutes. Appearance of yellow coloured precipitate confirmed the presence of alcohol (ethanol) in cold drinks.

Observations:
Sr. No.
Name of drink
Observation
Inference
1.
Coca Cola

2.
Sprite

3.
Fanta

Inference:
All the cold drinks samples gave positive test for alcohol. Hence all the cold drinks contain alcohol.
Chemical Reaction: CH3CH2OH + 4I2 + 6NaOH → CHI3 + HCOONa + 5NaI + 5H2O Experiment 6: Test for Sucrose 5 ml samples of each brand of cold drinks were taken in separate china dishes and were heated very strongly until changes occur. Black coloured residue left confirmed the presence of sucrose in cold drinks. Observations:
Sr. No.
Name of drink
Observation
Inference
1.
Coca cola

2.
Sprite

3.
Fanta

Inference:
All the brands of cold drinks contain sucrose. But amount of sucrose varies in each brand of drink. Fanta contains highest amount of sucrose.

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