The reaction described in the table involves a nonmetal and an ionic compound as reactants, producing a nonmetal and an ionic compound as products.
Given the nature of the reactants and products, we can analyze the potential types of reactions:
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Single Replacement Reaction: This type of reaction generally involves an element reacting with a compound, where one element displaces another in that compound.
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Double Replacement Reaction: This type of reaction involves two ionic compounds reacting in solution, resulting in the exchange of components to form two new compounds.
Since the reactants consist of a nonmetal and an ionic compound, and the products also consist of a nonmetal and an ionic compound, we can infer that the nonmetal is likely displacing an ion from the ionic compound, which leans more towards a single replacement reaction.
However, this is complicated because the outcome still results in ionic compounds, which is a characteristic of double replacement reactions. Yet based on the description given ("Nonmetal + Ionic compound" reactants yielding "Nonmetal + Ionic compound" products) and the implication of changes involving the nonmetal and no indication that the ionic components are swapped in a typical sense, we can conclude that this is a case of a single replacement reaction where a nonmetal interacts with an ionic compound.
Therefore, the best interpretation is:
It is a single replacement reaction, and the anions in the two ionic compounds are different.
This interpretation logically fits if the nonmetal is replacing one of the cations in the ionic compound and maintaining the structure around it, producing a nonmetal with a different ionic compound.