
Polychlorinated biphenyls (PCBs) have been used extensivelyas dielectric materials in electrical transformers.Because PCBs have been shown to be potentially harmful,analysis for their presence in the environment hasbecome very important. PCBs are manufactured accordingto the following generic reaction:
This reaction results in a mixture of PCB products. Themixture is analyzed by decomposing the PCBs and thenprecipitating the resulting
a. Develop a general equation that relates the averagevalue of n to the mass of a given mixture of PCBsand the mass of AgCl produced.
b. A 0.1947-g sample of a commercial PCB yielded0.4971 g of AgCl. What is the average value of nfor this sample?

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Chapter 4 Solutions
EBK CHEMICAL PRINCIPLES
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- When two solutions, one of 0.1 M KCl (I) and the other of 0.1 M MCl (II), are brought into contact by a membrane. The cation M cannot cross the membrane. At equilibrium, x moles of K+ will have passed from solution (I) to (II). To maintain the neutrality of the two solutions, x moles of Cl- will also have to pass from I to II. Explain this equality: (0.1 - x)/x = (0.1 + x)/(0.1 - x)arrow_forwardCalculate the variation in the potential of the Pt/MnO4-, Mn2+ pair with pH, indicating the value of the standard potential. Data: E0 = 1.12.arrow_forwardGiven the cell: Pt l H2(g) l dis X:KCl (sat) l Hg2Cl2(s) l Hg l Pt. Calculate the emf of the cell as a function of pH.arrow_forward
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