Chapter 5, Problem 96FP

Interpretation Introduction

Interpretation:

The mass percent of protein needs to be determined, if 1.25 g sample of meat is heated with sulfuric acid to produce (NH₄)₂SO₄. It gets neutralized by 50 mL dilute H₂SO₄ and it requires 32.24 mL 0.4498 M NaOH for titration for which separate 25 mL sample dilute H₂SO₄ (aq) is needed for 22.24 mL of 0.4496 M NaOH.

Concept introduction:

Mass percent of a substance present in the sample can be determined by dividing mass of substance present in it to overall mass of sample. After that, multiply the overall result with 100 to get the percentage.

Such as mass percent of x g of a substance present in the y g sample can be determined as follows:

$\text{M \% = }\left(\frac{x}{y}\right)\times \text{ 100}$