Scan_Doc0032 - Additional Exercises 125 is an intermediate...

This preview shows page 1 out of 1 page.

is an intermediate step in the conversion of the nitrogen in organic compounds into nitrate ions. What mass of bacterial tissue isproduced inatreatment plant for every 1.0 X 10 4 kg of wastewater containing 3.0% NH4 + ions by mass? Assume that 95% of the ammonium ions are consumed by the bacteria. 125. Aspirin (C 9 H s 0 4 ) is synthesized by reacting salicylic acid (C 7 H 6 0 3 ) with acetic anhydride (C 4 H 6 0 3 ).The balanced equa- tion is a. What mass ofacetic anhydride isneeded tocompletely con- sume 1.00 X 10 2 gsalicylic acid? . b. What isthemaximum mass ofaspirin (thetheoretical yield) that could beproduced inthis reaction? 126. Astudent prepared aspirin inalaboratory experiment using the reaction in Exercise 125. The student reacted 1.50 g salicylic acid with 2.00 gacetic anhydride. The yield was 1.50gaspirin. Calculate thetheoretical yield and thepercent yield for this ex- periment. 127. Hydrogen peroxide isused asacleansing agent inthetreatment ofcutsandabrasions forseveral reasons. Itisanoxidizing agent that can directly kill many microorganisms; it decomposes on contact with blood, releasing elemental oxygen gas (which in- hibits thegrowth ofanaerobic microorganisms); anditfoams on contact withblood, which provides acleansing action. Inthelab-
Image of page 1

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern