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8090 [49]
3 years ago
3

Refer to the following gaseous molecules: (A) BeCl2 (B) SO2 (C) N2 (D) O2 (E) F2 Is best represented by two or more resonance fo

rms

Chemistry
1 answer:
Nikolay [14]3 years ago
0 0

Answer: SO2

Explanation:

The image below shows the resonance forms of SO2. Resonance forms are structures that are similar in energy and altogether describe the actual structure of a molecule. The real structure of the molecule is neither of the resonance forms but a hybrid of all the structures. Invocation of the idea of resonance simplifies apparent complexities such as equal bond length and bond angles.

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The first step is to write the balanced equation of the dissociation of the monoprotic weak acid. This can be assumed to have 1:1 stoichiometric relationships, so the equation and ICE chart are given by:

                          HA ---> H^+ + A^-
initial                 0.25       0          0
change               -x         x           x
equilibrium    0.25-x       x           x

This gives an expression for Ka given by:

Ka = (x)^2/(0.25-x) = 5.4x10^-6
x = 1.159x10^-3 = [H+] = [A-]

pH = -log[H+] = -log[1.159x10^-3] = 2.936
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