Question

ph colours and value of the following

saliva[before meal]

saliva[after meal]

lemon juice

colourless aerated drink

carrot juice

coffee

tomato juice

tap water

1m NAOH

1 M HCl

Answer 1

Acidic substances have pH value below ' 7 'and basic substances have pH value above' 7'

Foods such as orange juice and lemon juice are acidic in their natural state but turn alkaline after they have been metabolized in the body .A healthy person has a pH value of '7.4'.

sugars,eggs,red meat,dried fruits_________> highly acidic  

Fruit juice ,legumes, rice,soy milk ________> mildly acidic  

vegetables ,goat milk         _____________> mildly alkaline