The Base-Dissociation Constant of Ethylamine $\mathrm { C } _ { 2 }$

question 28

Multiple Choice

The base-dissociation constant of ethylamine ( $\mathrm { C } _ { 2 }$ $\mathrm { H } _ { 5 }$ $\mathrm { NH } _ { 2 }$ ) is 6.4 × $10 ^ { - 4 }$ at 25.0 °C.The [ $\mathrm { H } ^ { + }$ ] in a 1.7 × 10^-2 $\mathrm { mol } \mathrm { L } ^ { - 1 }$ solution of ethylamine is ________ mol L^-1.

• A)1.1 × 10^-5
• B)11.48
• C)3.3 × 10^-3
• D)3.0 × 10^-3
• E)3.3 × 10^-12

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