Question

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 perchlorate.

Bubbling
Formation of percipitate
Formation of soluble salts
Formation of a gas

Answer 1

It's b) Formation of a precipitate

Step-by-step explanation:

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Answer 2

Formation of precipitate

Formation of soluble salts

Step-by-step explanation:

Let's consider the molecular equation that takes place when an aqueous solution of cesium sulfate is mixed with an aqueous solution strontium perchlorate.

Cs₂SO₄(aq) + Sr(ClO₄)₂(aq) ⇒ 2 CsClO₄(aq) + SrSO₄(s)

According to the solubility rules:

• CsClO₄ is a soluble salt.

• SrSO₄ is an insoluble salt that precipitates as a solid.

For a double displacement reaction to occur, at least one of the products must be insoluble or volatile.