chemistry

posted by .

an 80ppm of KMno4 produced an absorbance of 0.4 in a 1.0cm cuvette. Calculate the molar absorptivity of KMno4

  • chemistry -

    A = ebc
    You have A.
    You want e.
    You have b.
    Convert 80 ppm to mols/L and substitute; solove for e.
    (Note: Remember that 1 ppm = 1 mg/L; therefore, 80 ppm is 80 mg/L. That should make it easy to convert to mols/L KMnO4)

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    At l=530 nm:aCuSO4=7.544L/mol-cm aKMnO4= 3.645 L/mol-cm At l=800nm: aCuSO4=2.908L/mol-cm aKMnO4= 5.412L/mol-cm you use a celleith a path length of 1.0cm An unknown solution containing both CuSO4 and KMnO4 gave an absorbance reading …
  2. Chemistry

    A 25.0cm^3 aliquot of a solution containing Fe2+ ions and Fe3+ ions was acidified and titrated against KMnO4 solution. 15.0cm^3 of 0.020M KMnO4 was needed. A second 25.0cm^3 aliquot was reduced using Zn, then titrated. This time, 19.0cm^3 …
  3. Organic chemistry

    Write equations for the reactions that occur. Put conditions and catalysts over the arrow. 1.CH3COOH + CH3(CH2)7OH 2.C6H14 + KMNO4 + H 3. CH3H12 + KMNO4 + H 4. CH3CHOHCH3 + KMNO4 + H 5. (CH3)3COH + KMNO4 + H 6. (CH3)2C=O + KMNO4 + …
  4. Chemistry

    The absorbance of a chlorophyll a standard solution in ethanol (density = 0.785 g/mL) is measured in a 1.3 cm cuvette or path length. The absorbance is 0.435 and the molar absorptivity coefficient is 86,300 M–1cm–1. The molecular …
  5. Chemistry

    The absorbance of a chlorophyll a standard solution in ethanol (density = 0.785 g/mL) is measured in a 1.3 cm cuvette or path length. The absorbance is 0.435 and the molar absorptivity coefficient is 86,300 M–1cm–1. The molecular …
  6. Chemistry

    Transferrin (T) - Molar mass = 81000g/mol - carries 2 Fe3+ ions Deferrioxxamine B (DB) molar mass = 650g/mol - carries 1 Fe3+ at wavelength 428 molar absorptivity T = 3240 molar absorptivity DB = 2630 at wavelength 470 molar absorptivity …
  7. General Chemistry.

    The absorbance of a chlorophyll a standard solution in ethanol (density = 0.785 g/mL) is measured in a 1.3 cm cuvette or path length. The absorbance is 0.765 and the molar absorptivity coefficient is 86,300 M–1cm–1. The molecular …
  8. Chemistry

    You are measuring the concentration of Fe2 in a sample by measuring the absorbance of its complex with ferroxine. Your sample, measured in a 1.00-cm pathlength cuvette, has an absorbance of 0.347 while the reagent blank in the same …
  9. Chemistry HELP!

    In order to standardize a KMnO4 solution, 0.3498 g Na2C2O4 was dissolved in 30 mL water and 15 mL 3.0 M H2SO4. The KMnO4 solution was added to the Na2C2O4 solution until a pale pink color persisted. The titration took 29.5 mL of KMnO4 …
  10. Chemistry HELP!

    In order to standardize a KMnO4 solution, 0.3498 g Na2C2O4 was dissolved in 30 mL water and 15 mL 3.0 M H2SO4. The KMnO4 solution was added to the Na2C2O4 solution until a pale pink color persisted. The titration took 29.5 mL of KMnO4 …

More Similar Questions