# Problem: The Ka of HCN is 6.2 x 10 -10. What is the Kb value for CN - at 25°C

🤓 Based on our data, we think this question is relevant for Professor Golde's class at PITT.

###### FREE Expert Solution

Since CN-  is the conjugate base of the weak acid HCN, we can relate Ka and Kb by the equation below:

Take note that the Kw at room temperature is something that you must memorize.

###### Problem Details

The Ka of HCN is 6.2 x 10 -10. What is the Kb value for CN - at 25°C

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Ka and Kb concept. You can view video lessons to learn Ka and Kb. Or if you need more Ka and Kb practice, you can also practice Ka and Kb practice problems.

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What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Golde's class at PITT.