Explain why Zn is released and write the general equation.

In summary, when we throw clean Zn into a HCl solution, nothing happens. However, when we add 2-3 drops of CuSO4, a gas is released. This is because the Zn reacts slowly with H+ ions, but the presence of traces of copper speeds up the reaction. The overall equation for this reaction is Zn+HCl->ZnCl2+H2.
  • #1
prishila
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Homework Statement


We throw clean Zn in a HCl solution and see that nothing happens. We add 2-3 drops CuSO4 and some kind of gas starts to release. Why dos this happen? Write the equation

Homework Equations


Zn+HCl->ZnCl2+H2

The Attempt at a Solution


I know that equation and also:
Zn+CuSo4->ZnSo4+Cu
But why doesn't H2 release in the first experiment? Maybe because it is too clean. COuld you also hep me with the general equation?
 
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  • #2
Zn reacts from the very beginning, just slowly. Traces of copper reduced on the Zn surface speed up the reaction between Zn and H+.
 

1. Why is Zn released?

Zn is released because of its reactivity with other substances. It is an active metal, meaning it can easily lose electrons and form positive ions, making it a good reducing agent.

2. How is Zn released?

Zn is typically released through a process called galvanization, where the metal is coated with a layer of zinc. It can also be released through chemical reactions, such as the reaction of zinc with an acid.

3. What is the general equation for Zn release?

The general equation for Zn release is Zn (s) → Zn2+ (aq) + 2e-, where Zn (s) represents solid zinc, Zn2+ (aq) represents the aqueous form of zinc, and 2e- represents the two electrons that are released during the reaction.

4. Why is zinc a good reducing agent?

Zinc is a good reducing agent because it readily loses electrons, which allows it to reduce other substances. This is due to its low electronegativity and the large difference in electronegativity between zinc and other substances.

5. How does the release of Zn benefit us?

Zn release has many benefits, including its use in galvanization to protect iron and steel from corrosion, as well as its use in batteries, alloys, and various industrial processes. It is also an essential micronutrient for humans and plays a role in various biological processes.

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