Answer:
The answer is Ka1
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When it comes to dissociation, Ka1 is fairly the most even-out level, classifying it as a Weak Acid.
They must be fully separable into ions. If that's the case, you are dealing with a Strong acid.
If this is not the case, that would make the acid Weak.
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In conclusion, I hope this helps you and I hope you have a great day!