Question

What information does the following chemical equations convey?
(a). Zn+H2SO4→ZnSO4+H2
(b). Mg+2HCl→MgCl2+H2

Answer 1

Hi user 

Here's the answer 
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First let us write the two equations.

1. Zn + H₂SO₄   =>  ZnSO₄ + H₂

2. Mg + 2HCl  =>  MgCl₂ + H₂

From the above equations we can get two set of conclusions.

Conclusions:

1. Acid + Metal  => Salt + Water

2. When a higher metal is placed in a lower metal's salt solution, the higher metal displaces the lower metal from its salt solution. This is called Displacement Reaction.
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Hope my answer helped you 

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