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Assume That an Aqueous Solution of Hydroxide Ion,OH-,represented by Unshaded

question 35

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Assume that an aqueous solution of hydroxide ion,OH-,represented by unshaded spheres,is allowed to mix with a solution of an acid,HnA,represented by gray spheres.Three possible outcomes are represented by boxes (a) -(c) ,where the black spheres represent An-,the anion of the acid.For clarity H2O molecules are not shown. Assume that an aqueous solution of hydroxide ion,OH<sup>-</sup>,represented by unshaded spheres,is allowed to mix with a solution of an acid,H<sub>n</sub>A,represented by gray spheres.Three possible outcomes are represented by boxes (a) -(c) ,where the black spheres represent A<sup>n</sup><sup>-</sup>,the anion of the acid.For clarity H<sub>2</sub>O molecules are not shown.   -Which outcome corresponds to the reaction: H<sub>3</sub>AsO<sub>4</sub> + 3 OH<sup>-</sup> → 3 H<sub>2</sub>O + AsO<sub>4</sub><sup>3-</sup>? A) box (a)  B) box (b)  C) box (c)  D) None of these
-Which outcome corresponds to the reaction: H3AsO4 + 3 OH- → 3 H2O + AsO43-?


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