
Interpretation: The figure that represents a solution containing three acids of which one is weak acid is given. The color of the anion of the dissociated weak acid is to be identified.
Concept introduction: Weak acid forms an equilibrium on dissolution such that a fraction of it is present in undissociated form along with the dissociated ions.
To determine: The color of the anion of the dissociated weak acid.

Answer to Problem 4.1VP
Solution
The anion of the weak acid is yellow color sphere.
Explanation of Solution
Explanation
In the given figure, there are three colored anions present, that is green, purple and yellow and only one colored cation that is grey. The grey colored sphere therefore represents a proton, since the cation present in the acid is proton.
A weak acid is the one that does not dissociate completely and a portion of it is present as in undissociated form. In the given figure, the two spheres that are attached are of yellow and grey color. The grey color sphere is the proton and the yellow color is the anion.
Hence, the attached two spheres represent a dissociated weak acid that has a proton of grey color and the anion of yellow color.
Thus, the anion of the weak acid is yellow color sphere.
Conclusion
The anion of the weak acid is yellow color sphere
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Chapter 4 Solutions
Chemistry: The Science in Context (Fifth Edition)
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