More than a lime, and even more than a grapefriut!!!
There is at least 5 percent citric acid inside of a lemon
I don't know, I just think they are sour but a slice is good with a glass of coke and some ice
1 teaspoon of citric acid = 4~6 teaspoons of lemon juice = 8 teaspoons of vinegar.
lemon juice is about 5% (approximately 0.3 mole per litre) citric acid
1 apple contains 21.67 mg citric acid(ref: www.whfoods.com)
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