If 26.3 mL of a fruit juice requires 13.7 mL of 0.0100 M I2 solution for reaction, what is the molarity of the ascorbic acid in the fruit juice?
V1 = 26.3 ml
M2 = ?
V2 = 13.7 ml
M = 0.01 I2
Assume 1 mol of I2 reacts with 1 mol of fruit juice
Ascorbic acid + I2 <--> 2HI + ascorbate
then
mol of acid = mol of I2
mol of I2 = MV = 13.7*0.01 = 0.137 mmol of I2
now,
since ratio is 1:1
0.137 mmol of acid was there
[Acids] = mmol/V = 0.137/26.3 = 0.005209
[Ascorbic Acid] = 0.005209 M
If 26.3 mL of a fruit juice requires 13.7 mL of 0.0100 M I2 solution for...
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