Answered: Why is it not necessary to add more…

Introductory Chemistry: A Foundation

9th Edition

ISBN:9781337399425

Author:Steven S. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Donald J. DeCoste

Chapter9: Chemical Quantities

Section: Chapter Questions

Problem 11CR

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Question

The exhaust systems of cars today are equipped with catalytic converters that uses rhodium and platinum as catalysts. No more than 4-9 grams of these precious metals are used in a single converter. This catalyst speeds up reaction of three types of toxic compounds given off the cars. The rhodium and platinum as catalysts do not enter into a chemical reaction, but the rough surface of the catalyst provides a high-surface area for the reaction to occur. Catalytic converters change unburned hydrocarbons, carbon monoxide, and nitrogen oxides into harmless compound.

Why is it not necessary to add more rhodium and platinum to a catalytic converter as these substances are used?

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