Lemon is acidic or alkaline?


      There has a great difference in the answer if we consider the 

question under views of chemistry or nutritional science.  So, lemon is

acidic or alkaline?  It commonly believes that lemon is acidic because 

it's sour in taste.  However, in the view of nutritional science, lemon

is an alkaline food.



      Why?  The answer is simple as when we take in the food, it will

become alkaline.  That's why we classify it as an alkaline food.  For

example, when we take in lemon juice (wow.. so sour! :P), It'll be 

oxidize to form water, carbon dioxide and an inorganic compound.  The

alkaline or acidic nature of the inorganic compound formed determines 

whether the food is an alkaline or acidic.



  If it contains more sodium, potassium or calcium, it'll become 

an alkaline food.  Because when sodium compounds dissolve in water, it 

forms an alkaline solution.  

Na2CO3 + H2O ---> 2NaHCO3
HCO3- + H2O ---> H2CO3 + OH-
2(Na+)2O22- + 2H2O ---> 4Na+OH- + O2

      You may doubt, where comes the NaCO3 & 2(Na+)2O22-?.. ha ha.. :-)  

Ok, just recall your memories with Junior forms biology.  The food you

ingest, no matter that's chickren leg or french fries.  It burns!!!  

Of coz a fire won't be set, instead, a series of complex chemical 

oxidation process will take place.  It's similar to an simple experiment 

by, 

1. heating the food to burn out all of the organic matters.

2. dissolving the ash

3. test it with limus.



      In contract, if it contains more sulphur, phosphate or chloride,

it forms an acid food.



      So, what is the answer to the question?  From the action of 

turning red in the experiment when we put lemon juice on blue litmus

paper, we know that lemon juice is indeed acidic.

      

      With different point of view, we may have different result to 

determine whether the chemical is acidic or alkaline.  So, please take

care of it. ;-)





reference :

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Modern Inorganic Chemistry(ELBS) by G.F.Liptrot


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