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what is the pH value of saliva before and after meal,lemon juice,colourless, aerated drink, carrot juice,coffee, tomato juice,tap water,1M NaOH,1M HCl?
 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


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