Using different volumes of a 37.7 mg L-1 iron stock solution, a series of ferrou

Question

Using different volumes of a 37.7 mg L-1 iron stock solution, a series of ferrous ion complexes were made. Each solution was diluted to a final volume of 100.0 mL. The absorption of each of these solutions was measured and thee resulting data is reported below Volume Fe used (mL) Absorbance 0.99 2.16 4.16 6.11 84 9.65 0.089 0.209 0.377 0.499 0.686 0.857 Plotting this data and fitting to a linear function yields a line with slope 0.227 L mg -1 and R2 0.994 bsorbance vs Concentration 1.00 0.90 0.80 0.70 0.60 e 0.50 0.40 0.30 0.20 0.10 0.00 Concentration of Fe2+ (mg/L)

Explanation / Answer

since the slope is 0.227

so the concentration of the diluted solution is x=absorbance/slope

=0.795/0.227

=3.50mg/l

the original solution before dilution is M1V1=M2V2

3.50*250=y*25

y=35mg/L

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.