What Is the Hydroxide-Ion Concentration at Equilibrium in a 0

question 142

Multiple Choice

What is the hydroxide-ion concentration at equilibrium in a 0.66 M solution of ethylamine (C₂H₅NH₂,K_b = 4.7 × 10^-4) at 25^oC?

• A)1.7 × 10^-2 M
• B)2.7 × 10^-2 M
• C)1.5 × 10^-14 M
• D)5.8 × 10^-13 M
• E)6.6 × 10^-1 M

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Definitions:

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The process by which characteristics or traits of organisms change over generations through natural selection and genetic drift.

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The ability of a species to continue existence and avoid extinction by adapting to environmental changes or overcoming threats.

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The idea that the natural laws observable around us now are also responsible for events in the past. One part of this view, for example, is the idea that Earth has been shaped by the cumulative action of gradual processes like sediment deposition and erosion.

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