The K_a for HCN Is 4

question 97

Multiple Choice

The K_a for HCN is 4.9 × 10^{- 10}. What is the value of K_b for CN^- ?

• A) 4.9 × 10⁴
• B) 2.0 × 10^{- 5}
• C) 2.0 × 10⁹
• D) 4.0 × 10^{- 6}
• E) 4.9 × 10^{- 24}

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