Someone please help me figure out the significant figure
1 answer:
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Answer:
0.0017 Hz
Explanation:
the solution is in the photo
<h3>![\tt C.~Ka=\dfrac{[H^+][CN^-]}{[HCN]}](https://tex.z-dn.net/?f=%5Ctt%20C.~Ka%3D%5Cdfrac%7B%5BH%5E%2B%5D%5BCN%5E-%5D%7D%7B%5BHCN%5D%7D)
</h3><h3>Further explanation </h3>
According to Arrhenius, acids are substances which, when dissolved in water, release Hions.
An HₓY acid in water will ionize:
HₓY (aq) ⇒ xH⁺ (aq) + Yˣ- (aq)
In general, the weak acid ionization reaction
HA (aq) ⇒ H⁺ (aq) + A⁻ (aq)
Ka's value
So for HCN
HCN(aq)⇒H⁺(aq)+CN⁻(aq)