Vanadium is an environmental pollutant originating from some types of steel, but
also from the combustion of fossil fuels. The amount of V2+ in an unknown sample is
determined by potentiometric titration by 7.62 mM permanganate ion, MnO4
. 25.00 mL of
unknown was titrated with 12.38 mL of 7.62 mM MnO4
- using a SCE reference electrode (Eref =
0.241 V). pH of the solution was maintained at pH = 4.00. Determine the potential at the
equivalence point and the concentration of vanadium in the unknown sample.
V3+ + e- → V2+ Eo = -0.255 V
- + 8H+ + 5e- → Mn2+ + 4 H2O Eo = +1.507 V

  1. 👍 0
  2. 👎 0
  3. 👁 48
asked by siri

Respond to this Question

First Name

Your Response

Similar Questions

  1. Math - Simple rational Function (check)

    A pollutant has been leaking steadily into a river. An environmental group undertakes a clean-up of the river. The amount of pollutant in the river after t years the clean-up begins is given by the equation N(t)=0.5t+(1/(10t+1))

    asked by Anonymous on October 25, 2010
  2. chemistry

    Vanadium oxide is used as an industrial catalyst. The percent composition of this oxide is 56.0% vanadium and 44.0% oxygen. Determine the empirical formula for vanadium.

    asked by chris on November 28, 2012
  3. science 207

    chronic asthms when caused by air p[ollution is ,most likely due to: short term pollutant exposer long term pollutant exposer thbe weather during an episode of pollutant expossure exposure to a cerain kind of pollutant

    asked by sarah on March 24, 2013
  4. science

    Vanadium has several oxidation states. write correct formulas for vanadium (iii) oxide and vanadium (v) oxide.

    asked by jason on February 25, 2014
  5. science

    Vanadium has several oxidation states. write correct formulas for vanadium oxide and vanadium oxide.

    asked by jason on February 25, 2014
  6. Physics

    PLEASE HELP! I'm doing a physics demonstration, and in part of it I'm trying to explain why steel wool burns and normal steel doesn't. I know it's something to do with the smaller surface area and/or mass but I don't know WHY it

    asked by Jo on September 5, 2006
  7. chemistry

    Vanadium forms four different oxides in which the percent by mass of vanadium is respectively 76%, 68%, 61%, and 56%. Find the formula of the first oxide. How would I go about doing this? I tried to use my book but there are no

    asked by Cory on September 21, 2009
  8. Math

    Polluted water flows into a pond. The concentration of pollutant in the pond at the t minutes is modelled by the equation c(t)= 9-90,000(1/10000+3t), where c is measured in kilograms per cubic metre. a) When will the concentration

    asked by Cindy on October 25, 2017
  9. Chemistry

    (a) What is the distance between second nearest neighbor atoms in vanadium? Express your answer in cm. (b) What is the interplanar spacing between (110) planes in vanadium? Express your answer in cm. (c) At what angle must (110)

    asked by Chemgam on January 11, 2013
  10. Intermediate Algebra

    Environmental scientists often use cost-benefit models to estimate the cost of removing a pollutant from the environment as a function of the percentage of pollutant removed. Suppose a cost benefit function for the cost C (in

    asked by Anonymous1234 on November 11, 2014

More Similar Questions