Decide whether or not each of the following metals dissolves in 1 M HNO3. For th

Question

Decide whether or not each of the following metals dissolves in 1 M HNO3. For those metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves.

Part A

Co

Express your answer as a chemical equation. Enter noreaction if there is no reaction. Identify all of the phases in your answer.

Part B

Al

Express your answer as a chemical equation. Enter noreaction if there is no reaction. Identify all of the phases in your answer.

Decide whether or not each of the following metals dissolves in 1 M HNO3. For those metals that do dissolve, write a balanced redox reaction showing what happens when the metal dissolves.

Part A

Co

Express your answer as a chemical equation. Enter noreaction if there is no reaction. Identify all of the phases in your answer.

Part B

Al

Express your answer as a chemical equation. Enter noreaction if there is no reaction. Identify all of the phases in your answer.

Explanation / Answer

Part B Pure Al metal can react with Nitric acid.

2Al(s) + 6HNO3(aq -----> 2 Al(NO3)3 +3 H2

However Al metal usually gets coated with a protective layer of AL2O3 , then it becomes passive toward nitri acid. then no reaction.

Co reacts with nitric acid to give cobalt nitrate hexahydrate.

Co + 4HNo3 + 4H2O --------> Co(NO3)2.6H2O + 2NO2

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