Pineapple Juice Colour Produced On The Ph Paper

To analyse the pH of fruits or vegetable juices, either the pH paper is dipped into the solution or a universal indicator is put into the juices. Depending upon the pH, different coloured solutions are formed and this colour change can determine the pH of the solution which can be understood from the pH scale indicator. PROCEDURE (i) Using pH Paper.

Take some clean and dry test tubes and place various samples of vegetable and fruit juices in each of them. (ii) Now put one or two drops of each sample on different strips of pH paper Note the colour formed on each strip and compare the shade with those on the colour chart. Record the pH of the compared shade.

1. Using pH Paper. Take some clean and dry test tubes and place various samples of vegetable and fruit juices in each of them.

Now put one or two drops of each sample on different strips of pH papers. Note the colour formed on each strip and compare the shade with those on colour chart. Record the pH of the compared shade.

2. Using Indicator. Learn the procedure to determine the pH of solutions obtained from fruit juices and other acids, bases, and salts using pH paper or a universal indicator.

Understand the precautions to be taken and observe the changes. Observations And Results pH of Vegetable and Fruit juices For pH paper For indicator solution Sample Colour produced on pH. Use a separate dropper to transfer each juice sample into a test tube.

Add two drops of universal indicator. Mix the content thoroughly by shaking it gently. Refer the pH chart to match the colour that appears in the test tube.

(match the colour produced with standard colour pH chart) Record your observation. Materials Required pH paper, Universal indicator, sample solutions, test tubes, white tile and dropper The Procedure of Determination of pH Using Universal Indicator Take the given samples of fruit juices like lemon, orange, pineapple, and apple in a separate test tube. Make sure you have taken at least 2 mL of juices in each test tube.

Find the approx pH of vegetable and fruit juices using a universal indicator and pH paper. Includes color changes for lemon & tomato juices. The Pineapple Juice is acidic; the color with pH paper Merck no.

9565 is red to brown. The pH of various fruit juices is: Grape juice: 2.22-2.81 Lemon juice: 2-3 Orange juice: 3.3-4.2 Pineapple juice: 2.51-3.91 The pH of a food is a measure of its acidity, or the concentration of free hydrogen ions in the food. Foods with a low pH are high in acid, and have a sour flavor.