PH question

[rainbow-chick]

[SOLVED] pH question....

i'm writing a research paper on the organic medicinal massage oils. i need to know the chemical composition of citric acid and it's pH. can anyone help me???

 

[stewartcs]

i'm writing a research paper on the organic medicinal massage oils. i need to know the chemical composition of citric acid and it's pH. can anyone help me???

http://en.wikipedia.org/wiki/Citric_acid

CS

 

[Borek]

There is no such thing as "pH of an acid". However, there is such thing as "pH of solution of the acid of known concentration". If you don't know concentration you can't say anything about pH. At best you may list dissociation constants.


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[rainbow-chick]

what i was really looking for was the pH of lemon juice i read somewhere that lemon juice was pure citric acid....?? sounds stupid now that i think about. sorry and thank you for your help!!

 

[symbolipoint]

what i was really looking for was the pH of lemon juice i read somewhere that lemon juice was pure citric acid....?? sounds stupid now that i think about. sorry and thank you for your help!!

"Pure citric acid" ---- nonsense since citric acid itself is a solid. Lemon juice is a liquid, a solution which contains a few solutes including citric acid. (Condition assumed, room temperature. ) Good thinking on your next thought shown from your message.

 

[rainbow-chick]

"Pure citric acid" ---- nonsense since citric acid itself is a solid. Lemon juice is a liquid, a solution which contains a few solutes including citric acid. (Condition assumed, room temperature. ) Good thinking on your next thought shown from your message.

well can anyone tell me the pH of lemon juice?

 

[Gannon]

well can anyone tell me the pH of lemon juice?

Taken from Wikipedia (might want to double check credibility):

"Lemon juice is about 5% (approximately .030 moles/Liter) citric acid, which gives lemons a tart taste, and a pH of 2 to 3."

 

[Borek]

well can anyone tell me the pH of lemon juice?

No, because it varies, depending on the fruit ripeness. That's what the first commercially available pH meter (Beckman's Model G) was made for - to help assess lemon ripeness.


www.ph-meter.info