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rewona [7]
3 years ago
15

Consider the given acid ionization constants. identify the strongest conjugate base.

Chemistry
2 answers:
WARRIOR [948]3 years ago
7 0
The question is incomplete. Complete question is:
<span>Consider the given acid ionization constants. identify the strongest conjugate base.
</span>HNO2(aq) 4.6×10−4
HCHO2(aq) 1.8×10−4
HClO(aq) 2.9×10−8
HCN(aq) 4.9×10−10
.........................................................................................................................
Correct Answer: option 4: HCN(aq) 4.9×10−10

Reason: 
According to Lowry and Bronsted theory of acid and base. Stronger the acid, weaker will be the conjugate base.

In present case, ionization constant is highest of HCN i.e. 4.9×10^{-10}. This signifies that, it is the strongest acid. Hence, conjugate base associated with this acid (i.e. CN^{-}) is the weakest. 
stealth61 [152]3 years ago
4 0
Missing question:
<span>HNO2(aq) 4.6×10−4
HCHO2(aq) 1.8×10−4
HClO(aq) 2.9×10−8
HCN(aq) 4.9×10−10
</span>Answer is:<span> the strongest conjugate base is CN</span>⁻(aq), because it has highest base ionization constant.
Chemical reaction: HCN(aq) ⇄ CN⁻(aq) + H⁺(aq).
Ka(HCN) = 4,9·10⁻¹⁰.
Ka · Kb = Kw; ionic product of water.
Kb = Kw ÷ Ka.
Kb(CN⁻) = 1·10⁻¹⁴ 4,9·10⁻¹⁰.
Kb(CN⁻) = 2,04·10⁻⁵.
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