1.) A 0.062 M aqueous sample of species y was analyzed by atomic absorption spec

Question

1.) A 0.062 M aqueous sample of species y was analyzed by atomic absorption spectroscopy at 525 nm and in a 1.00-cm cell and yielded a %T value of 70.19 % . Calculate the molar absorptivity of species y.

2.)At 575.0 nm, a solution containing 0.0523 g/L CuSO4 (159.61 g/mol) in a cell of path length 1.00 cm gave an absorbance (A) of 0.2480. Calculate : a. the molarity of CuSO4 b. the absorptivity of CuSO4 units of (L/g.cm)

c. the molar absorptivity of CuSO4

3.Measurements were made on a UV-VIS instrument at 525 nm.

A solution containing 0.0452 g/0.500L KMnO4 in a cell of path length 0.500 cm gave an absorbance (A) of 0.492. Calculate:

a. the ppm of KMnO4

b. the transmittance (T)

c. the % transmittance

Explanation / Answer

1)

A=-log((529*(70.19/100))/529)

so, A =0.1537

Also,

byBeer

Related Questions

Navigate

• Browse (All)
• Browse 1
• Subjects

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