Questions: which of the following observations would be the expected indication that a reaction has taken place when a solution of cesium sulfate is mixed with strontium nitrate?

which of the following observations would be the expected indication that a reaction has taken place when a solution of cesium sulfate is mixed with strontium nitrate?
Transcript text: which of the following observations would be the expected indication that a reaction has taken place when a solution of cesium sulfate is mixed with strontium nitrate?
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Solution

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Solution Steps

Step 1: Understand the Reaction

When a solution of cesium sulfate (\(\text{Cs}_2\text{SO}_4\)) is mixed with strontium nitrate (\(\text{Sr}(\text{NO}_3)_2\)), a double displacement reaction may occur. In such reactions, the cations and anions of the reactants exchange partners, potentially forming a new compound.

Step 2: Identify Possible Products

The possible products of the reaction between cesium sulfate and strontium nitrate are cesium nitrate (\(\text{CsNO}_3\)) and strontium sulfate (\(\text{SrSO}_4\)).

Step 3: Determine the Expected Observation

Strontium sulfate (\(\text{SrSO}_4\)) is known to be insoluble in water. Therefore, when it forms, it will precipitate out of the solution. This formation of a precipitate is a common indication that a chemical reaction has taken place.

Final Answer

The expected indication that a reaction has taken place is the formation of a precipitate. Therefore, the answer is:

\(\boxed{\text{formation of a precipitate}}\)

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