TA= Total Acidity To determine TA, a 15 g portion of a juice was taken, and...
TA= Total Acidity
To determine TA, a 15 g portion of a juice was taken, and
17.5 mL of 0.085 N NaOHwas used to titrate the total acid.
What is the TA of the juice, expressed as % wt of citric acid?
(Citric acid MW = 192, with 3 dissociable H+)
Homework Answers
total moles of H+ ions reacted = 0.085 * 17.5 = 1.487*10^-3 moles
since 1 mole of citric acid contain 3 moles of H+ ions
so moles of citric acid reacted = 1.487 * 10^-3 / 3 = 0.496 *10^-3 moles
amount of citric acid reacted = 0.496*10^-3 * 192 = 95.2 *10^-3 g
% citric acid = (amount of citric acid reacted / amount taken citric acid ) * 100
= (95.2*10^-3 / 15 )*100
= 0.635 %
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