A solution containing 8.75 ppm KMnO4 has transmittance of 0.743 in a 1.00 cm cell at...

Question

Question

A solution containing 8.75 ppm KMnO4 has transmittance of 0.743 in a 1.00 cm cell at 520 nm.

science chemistry

Answer 1

Answer #1

concentration(C) = 8.75 ppm = 0.00875 gm /L = 5.53*10-5 mole /L = 5.53*10^-5 M

[ molar mass of KMnO4 = 158.034 gm and 0.00875 gm = 5.53*10-5 mole]

transmittance = 0.743

so, absorbance (A) = - log T = - log(0.743) = 0.1290

path length (l) = 1 cm

according to Lamber Beers law

$A =\varepsilon cl$ [ where $\varepsilon$ molar absorptivity]

or, $\varepsilon$ = 2332.7 M^-1 cm^-1

Answer 2

Similar Homework Help Questions

A solution containing 4.48 ppm KMnO4 (158.034 g/mol) has a transmittance of 0.309 in a 1...

A solution containing 4.48 ppm KMnO4 (158.034 g/mol) has a transmittance of 0.309 in a 1 cm cell at 520 nm, Calculate the molar absorptivity of KMnO4. Thank you!
A solution of benzene in methanol has a transmittance of 83% in a 1.00 cm cell...

A solution of benzene in methanol has a transmittance of 83% in a 1.00 cm cell at a wavelength of 254 nm. Only the benzene absorbs light at this wavelength, not the methanol. What will the solution's transmittance be if it is placed in a 10.00 cm long pathlength cell? O A. 8.80% OB. 2.1% OC. 98.2% OD. 8.30% OE. 15.5% OF. 96.2% O G. 27.8%
A solution of benzene in methanol has a transmittance of 83% in a 1.00 cm cell...

A solution of benzene in methanol has a transmittance of 83% in a 1.00 cm cell at a wavelength of 254 nm. Only the benzene absorbs light at this wavelength, not the methanol. What will the solution’s transmittance be if it is placed in a 10.00 cm long pathlength cell? A. 2.1% B. 27.8% C. 15.5% D. 96.2% E. 98.2% F. 8.80% G. 8.30%

A solution of potassium permanganate (KMnO4) whose concentration is 1.28X10^-4 M has a transmittance of 0.5...

A solution of potassium permanganate (KMnO4) whose concentration is 1.28X10^-4 M has a transmittance of 0.5 at a wavelength of 522 nm, in a 1.0 cm cell. a) What absorbance does this solution have? b) If the absorbance were double, what would be the transmission? c) What concentration would correspond to a transmittance of 0.75 in this cell?
I need help with 5 & 7 please (a) 15.8% (d) 23.8% (b) 0.492 (e) 0.085...

I need help with 5 & 7 please (a) 15.8% (d) 23.8% (b) 0.492 (e) 0.085 (c) 39.4% (f) 5.38% *13-3 Calculate the percent transmittance of solutions having half the abse solutions in Problem 13-1. f the absorbance of the cent transmittance of *13-4 Calculate the absorbance of solutions having twice the percent transmiti those in Problem 13-2. *13-5 A solution containing 6.23 ppm KMnO, had a transmittance of 0.195 in a 10 cell at 520 nm. Calculate the molar...
1) A solution containing 3.75 mg/100 ml of A (MW - 220 g/mol) has a transmittance...

1) A solution containing 3.75 mg/100 ml of A (MW - 220 g/mol) has a transmittance of 39.6% in a 1.50 cm cell at 480 nm. Calculate (a) the molar absorptivity of A, and (b) the transmittance of a solution of A which is twice as concentrated as the solution described above.

Please help Answer all question A solution containing 6.00 ppm KmnO_4 has a transmutation of 0.195...

Please help Answer all question A solution containing 6.00 ppm KmnO_4 has a transmutation of 0.195 in a 2.0 cm cell at 520 nm. Calculate the absorbance the molar absorbtivity of KMnO_4? For carbon dioxide, give the total number of one would expected Draw and label each Which once are Infrared active?
3. A 2.50x10-M solution of a dye has an absorbance of 0.520 when measured in a 1.00 cm cell at 625 nm. Calculate th...

3. A 2.50x10-M solution of a dye has an absorbance of 0.520 when measured in a 1.00 cm cell at 625 nm. Calculate the %Transmittance of the solution. Will the %Transmittance increase or decrease if the concentration of the dye is increased. CamScanner
Another sample of KMnO4 solution has 80% of light of a given , passing through it...

Another sample of KMnO4 solution has 80% of light of a given , passing through it was transmitted when a cell of 4 cm was used for the sample analysis and the molar absorptivity was 2. Show that the concentration is 0.05 g/L Calculate the transmittance and Absorbance if the %T is (a) 1% (b) 10% (c) 100% If 25.8 mg of Benzene is dissolved in 250 ml of solution that absorbed at 256 nm, with absorption coefficient or molar...

Please I need Answers for ALL THESE QUESTIONS with explanation 2 A solution containing 52.4 mg/100ml...

Please I need Answers for ALL THESE QUESTIONS with explanation 2 A solution containing 52.4 mg/100ml of B (335 g/mole) has a transmittance of 45.2% in a 1.0 cm cell at 400nm. Calculate the "ABSORPTIVITY" of "B" at this wavelength Inna m L v inole -,.С/.x103 i-moll A Iron is treated with excess color 3.A 2.5ml aliquot of a solution containing 7.9ppm reagent to give a colored "Complex-product"; this was then diluted to 50ml with buffer. is 7,000 L/Mol/cm、.rm /つのフ...