Chemistry Project: PH Analysis of Fruits

CHEMISTRY ANALYSIS OF pH OF VEGETABLE AND FRUIT JUICES

Class: XI Science Roll no.: 32

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Acknowledgement

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Introduction Experiment

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-Aim -Materials required -Observation -Result

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ACKNOWLEDGE MENT

I would sincerely like to thank Mr Anwar-ul Haque, PGT Chemistry, who has been there always to help me carry out this project as a guiding spirit behind the compiling of this report. I would also like to thank him for unending assistance to enable completion of the exercise.

CER TIFI This is to hereby certify that the original and genuine CAT investigatory project has been completedEsincerely and satisfactorily by Joydeep Naskar of class XI – Sc. Kendriya Vidyalaya IIM Joka, Kolkata, regarding his project titled “Analysis of pH of Vegetable and Fruit Juices” as per the CBSE practical work requirement for the session 2014-2015.

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Examiner’s

Our body needs important nutrients to support its healthy condition, that is why it is imperative that our food consumption should include healthy foods that contain good amount of nutrients sufficient enough to supply our body with its required daily nutrition. This project deals with finding out various pH values of juices of different vegetables and fruits.

AIM: Qualitative Analysis of pH and acidity of: Fruits juices- Apple, Grape, Orange, Cranberry, Raw Mango. Vegetable Juices- Onion, Papaya, Cabbage, Cucumber, Pumpkin.

MATERIALS REQUIRED: 1. Fruits and vegetables under investigation 2. Test Tubes 3. Beakers 4. Universal pH indicators (pH paper) 5. Glass Rod

OBSERVATIONS FRUIT JUICES 1.Apple Juice Apple juice ranges in pH from 3.35 to 4, as different types of apples have different pH levels.

2.Grape Juice

The pH of grape juice ranges. from about 2.92 to 3.53, depending on the type of grape used.

3.Orange Juice Orange juice ranges in pH from 3.3 to 4.19, depending on the type of orange used.

4.Cranberry Juice Cranberry juice is more acidic than apple juice, with a pH between 2.3 and 2.52.

5.Raw Mangoes The pH of Mangoes ranges from 3.40 - 4.63, as different mangoes have different pH.

VEGETABLE JUICES 1. Onions Onions have a pH of about 5.3-5.9.

2. Papaya Papaya has a pH of about 5.2-6.

3. Cabbage Cabbage has a pH of about 5.2-6.8

4. Cucumber Cucumbers have a pH of about 5.1-5.8.

5. Pumpkin Pumpkin has a pH between 4.9-5.5.

RESULT: After performing the pH tests on different vegetables and fruits, it is observed that most fruits and vegetables contain juices which are acidic in nature. The investigated fruits and vegetables are all found to be acidic, among which, fruits are more acidic than the vegetables.

Various books and websites were referred while making this project: 1) Chemistry Textbook for class XI, Part-I, NCERT

2) Chemistry Laboratory Manual for class XI, NCERT 3) Wikipedia.org 4) ConnectU Edu 5) Youtube.com