![\tt C.~Ka=\dfrac{[H^+][CN^-]}{[HCN]}](/tpl/images/0881/7756/58294.png)
Further explanation ![\large {\boxed {\bold {Ka \: = \: \frac {[H ^ +] [A ^ -]} {[HA]}}}}](/tpl/images/0881/7756/560b5.png)
![\tt Ka=\dfrac{[H^+][CN^-]}{[HCN]}](/tpl/images/0881/7756/a5454.png)
What is Ka for HCN(aq) H+(aq)+CN-(aq)?
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