Question

PH value of : 1) saliva (before meal) 2)saliva (after meal) 3)lemon juice 4)colourless aerated drink 5)carrot juice 6)coffe 7)tomato juice 8)tap water

Answer 1

1. saliva(before meal)- 7.4
2. saliva(after meal)- 5.8
3. lemon juice- 2.5
4. areated drink- 6.0
5. carrot juice- 5.6
6. coffee- 5.0
7. tomato juice- 4.1
8. tap water 6.9 to 7.1

Answer 2

PH values of the above beverages:

On drinking the following beverages the value of PH papers will differ as per their acidity or basicity starting from the most acidic. Let us arrange these beverages accordingly:

• HCL will be the most acidic and hence the pH will be 1 and it will have red color.
• Then comes lemon juice that will have pH 2. Thus will have pink colour.
• The pH after having tomato juice will be 4.
• Then the pH after meal or after having coffee will be same that is 5 and the colour will be yellow.
• Followed by carrot juice and aerated drinks which will have PH of 5.6 and 6 respectively and the colors being yellow and lime green.
• Tap water and mouth before meal will have a pH of 7 and at last the PH of any will be most basic that is 14.