Question

How do I calculate the mass?

4. Calculate the mass of acid per gram of sample for both the candy and milk. a. Candy: Trial 1 Trial 2 b. Milk: Trial 1 Trial 2

Answer 1

4. The mass of the acid per gram is calculated in the below image.

Q1:Please find the below balanced equation of the neutralization by NaOH with Lactic and citric acid.

Coloration a mass in gram. illa Cibic acid, - Molecular formula - Collgoz donud mass of Carbon C) is 12 Alpid we Huosadon is 1 lent mart of oxyen (o) is 16 1. Mass of color (6+12) + (8x1) + (7x16) , = 192 g/mol Trial 2 : Malic acid or Moleculas formula = C4 H605 Mass g malto aud in gram 1 = (4x12) + (6X1) + (5X16) = 134 g/mol b) Milk Poralt Lactic acid Molecular fomula - C3H2O3 Mass g. lactic acid = (3x12) +6x1) +(3X16) = 90g/mol. Trial 2 Colic aid found in sour mik, Molecular formula - CSM1907 Massa (6X12) + (841)+GX16) = 1929 /mol.

AQ2. As candy has citric acid and milk has lactic acid as the major ingredients. Based on their structure analysis as drawn in the above image, it is observed fact that lactic acid has three acidic groups (3 -COOH) and citric acid has only one acidic group (1 -COOH). Also  the lactic acid has a pka of 3.86. citric acid has pKa of 2.92, as we know that the strength of acid is depend on the pKa values. The lower is the pKa value ,the acid would be more stronger therefor citric acid has low value of pKa (2.92) than lactic acid pKa value (3.86).

Page No Date 1. A.) Balanced equation for the titration of Naotha atic and is as below H₃ CH 07 + 3NaOH -> Naz 6H507 +40 peida sase salt + water laq) (aq) (aq) b) Balanced equation for the fibration & Naosh rost Lactic acid is as below MCH O₂ + Nach Na GH 0 tho (aa) coa) Aud Base Salt Horech COOH Ha cool cooH cific and ladic and Cz 1603 Collo7

So the candy is more acidic than milk.