Answer :
The acid ionization constant of a solution is represented as Ka. The Pka is the negative logarithm of Ka value. The ka value of the acid with pka of 5.2 is 6.3 × 10⁻⁶ .
What is acid ionization constant?
Acid ionization constant is the ratio of product of concentration of the ions in the acid to the molar concentration of the acid.
If and cid HA ionizes into H+ and A- then ionization constant Ka is written as follows:
Ka = [A-] [H+] / [HA]
Mathematically pka is the negative logarithm of ka value. The pka value is given 5.2 thus ka value is calculated as follows:
pka = -log (Ka)
- 5.2 = log (Ka)
Ka = antilog (5.2)
= 6.3 × 10⁻⁶.
Therefore, ka value of the acid with pka of 5.2 is 6.3 × 10⁻⁶ .
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