Post a New Question

Chem Quanti

posted by .

An organic pesticide (MW 183.7) is 8.43% Cl. A 0.627-g sample containing the pesticide plus inert material containing no chloride was decomposed with metallic sodium in alcohol. The liberated chloride ion was precipitated as AgCl weighing 0.0831 g. Calculate the percentage of pesticide in the sample.

  • Chem Quanti -

    mass AgCl = 0.0831 g.
    moles AgCl = 0.0831/molar mass AgCl = ?
    moles AgCl = moles Cl.
    ?moles Cl x atomic mass Cl = g Cl.

    %Cl = (g Cl/g pesticide)*100 = 8.43%
    You have %Cl and g Cl, solve for g pesticide, then
    %pesticide = (g pesticide/g sample)*100 = ?
    Check my work.

  • Chem Quanti -

    Thanks :d

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    The traditional method of analyzing the amount of chloride ion present in a sample was to dissolve the sample in water and then slowly add a solution of silver nitrate. Silver chloride is very insoluble in water, and by adding a slight …
  2. AP Chem

    A sample of solid KCl (potassium chloride) weighing 0.500 g is mixed with an unweighed sample of solid MgCl2 (magnesium chloride) and the mixture is then completely dissolved in water to form a clear solution. An aqueous solution of …
  3. Chem 219

    If 48.9g of barium chloride dihydrate, BaCl2.2H20, was treated with excess silver nitrate solution. (show formula) a). how many moles of silver chloride precipitated?
  4. Chemistry

    Suppose that a 0.6123-g unknown chloride-containing sample was dissolved, and and AgCl precipitated by adding a AgNO3 solution. The precipitate was filtered, ignited, and found to weigh 0.3324 g. What was the percent chloride in the …
  5. Chemistry

    A 0.5370 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. The mass of the resulting AgCl is found to be 1.2523 g. …
  6. Analytical chemistry

    Below i wrote a few problems, i did them all but in the book i don't have results, so i don't know if i did them right or not. I would really appreciate if someone would go through the problems and tell me if i got the right results. …
  7. chem quantity

    a sample of soil containing hydrated barium chloride potassium chloride plus inert material weighd 0.8076g. tha sample was then dissolvd in water n treated with silver nitrate.tha resulting precipitate was collectd n found to weigh …
  8. chemistry

    A 0.5917 g sample of a pure soluble chloride compound is dissolved in water, and all of the chloride ion is precipitated as AgCl by the addition of an excess of silver nitrate. The mass of the resulting AgCl is found to be 1.5683 g. …
  9. Organic

    Which layer is likely to be on the bottom in each case?
  10. gravimertic prob

    an organic pesticide (mw 183.7) is 8.43% cl. a 0.627g sample containing the pesticide plus inert material containing no chloride was decomposed with metallic sodium in alcohol. the liberated chloride ion was precipitated as agcl weighing …

More Similar Questions

Post a New Question