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Ka is the equilibrium constant of an acid. If Ka is less than 1, then the acid is considered very weak. pKa is the negative log of Ka, which is just used to make the math a bit easier. The smaller the pKa, the stronger the acid.
Ka is acid dissociation constant and represents the strength of the acid. pKa is the -log of Ka, having a smaller comparable values for analysis. They have an inverse relationship. Larger the Ka, smaller the pKa and stronger the acid.
Yes, it would. The weaker the base, the smaller the value of Kb and the greater the value of pKb. Essentially, a large Kb value indicates the high level of dissociation of a strong base. A lower pKb value indicates a stronger base.
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