Question

Write a molecular equation for the precipitation reaction that occurs (if any) when each set of solutions is mixed. If no reaction occurs, write NOREACTION.

Part A

copper(II) bromide and lead (II) acetate

Express your answer as a chemical equation. Identify all of the phases in your answer. Enter NOREACTIONif no no reaction occurs.

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Part B

lithium sulfide and strontium iodide

Express your answer as a chemical equation. Identify all of the phases in your answer. Enter NOREACTIONif no no reaction occurs.

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Part C

cesium chloride and calcium sulfide

Express your answer as a chemical equation. Identify all of the phases in your answer. Enter NOREACTIONif no no reaction occurs.

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Part D

aluminum sulfate and sodium phosphate

Express your answer as a chemical equation. Identify all of the phases in your answer. Enter NOREACTIONif no no reaction occurs.

Answer 1

Copper (II) bromide and lead acetate

CuBr₂ + Pb(CH₃COOH)₂ ==== PbBr₂ (s) + Cu(CH₃COOH)₂

PbBr₂ is a precipitate.

lithium sulfide and strontium iodide

Li₂S + SrI₂ === 2LiI + SrS (s)

In order to see this reaction the concentration of the reactants must be high enough.

cesium chloride and calcium sulfide

2 CsCl + CaS === Cs₂S (s) + CaCl₂

Cs₂S (s) this is a precipitte

aluminum sulfate and sodium phosphate

Al₂(SO₄)₃ + 2Na₃PO₄ ====2AlPO₄ (s) + 3Na₂(SO₄ )

AlPO₄ (s) is a precipitate