Determine the K_b for CN⁻ at 25°C

question 118

Multiple Choice

Determine the K_b for CN⁻ at 25°C.The K_a for HCN is 4.9 × 10^-10.

• A) 4.9 × 10^-14
• B) 2.3 × 10^-9
• C) 1.4 × 10^-5
• D) 2.0 × 10^-5
• E) 3.7 × 10^-7

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Definitions:

Rational Exponents

An exponent that is a fraction, where the numerator indicates a power and the denominator indicates a root.

Rewrite

The act of expressing something in a different way or form, especially to clarify or simplify it.

Radical Expression

An expression that includes a square root, cube root, or higher root symbol.

Evaluate

To calculate the numerical value of; to determine the significance, worth, or condition of usually by careful appraisal and study.