The following table and graph represent the absorbance of different solutions of

Question

The following table and graph represent the absorbance of different solutions of copper II nitrate. Based on the information above, what is the concentration of an unknown solution that had an absorbance of 0.224? Each of the solutions used to make the Beers Law Plot in the example above were made by taking a volume of a stock solution of copper II nitrate, putting it into a 250.ml. volumetric flask, and then filling to the calibration line with distilled water. If the stock solution was 0.2943M, complete the chart below:

Explanation / Answer

E. Based on the data

1. unknown

absorbance = 0.224 M

concentration of unknown = 0.224 x 0.1/0.357 = 0.063 M

Complete table for preparing dilute solutions from stock

Volume of stock (ml)            conc. (M)

0.1 x 250/0.2943 = 84.95         0.1

0.05 x 250/0.2493 = 50.14       0.05

0.025 x 250/0.2493 = 25.07     0.025

0.01 x 250/0.2493 = 10.03       0.01

Related Questions

Navigate

• Browse (All)
• Browse T
• Subjects

---

---

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