[raafiki]

Write net equations for the spontaneous redox reactions that occur during the following or none if there is no extensive reaction.

Manganese metal is added to a MgSO4 solution
NONE (RIGHT)

Copper metal is added to hydrochloric acid
2H^1+ +Cu -> H2 +Cu^2+ (WRONG)

A silver wire is added to nitric acid
2H^1+ + 2Ag -> H2 + 2Ag^1+ (WRONG)

Magnesium metal is added to water
Mg +H2O -> H2 + MgO (WRONG)


Can some one help me with the last three? I cant figure out how to do them
I basically tried using the half reactions but it wasnt right...

[Hunter2]

The two first answers are correct. Number 3 something else happend. Number 4 think again. How it is wrote your answer is right, but correct it.

[raafiki]

The two first answers are correct. Number 3 something else happend. Number 4 think again. How it is wrote your answer is right, but correct it.

Could you go a little more into detail?..

[Hunter2]

Maybe use google and others by yourself. Silver get oxidiesed by nitric acid. Earth alkali metalls will form Hydroxide in aqueous solution. Copper is to noble to react with hydrochloric.

[Borek]

Copper metal is added to hydrochloric acid
2H^1+ +Cu -> H2 +Cu^2+ (WRONG)

Copper is not oxidized by H⁺, check reactivity series.

A silver wire is added to nitric acid
2H^1+ + 2Ag -> H2 + 2Ag^1+ (WRONG)

See above, you need a stronger oxidizing agent than H⁺.

Magnesium metal is added to water
Mg +H2O -> H2 + MgO (WRONG)

What happens when metal oxides are added to water?