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Sagot :
On adding solid zinc to the penny answer, the penny develops a zinc silver-colored coating. Zinc oxide and copper are created whilst copper(II) oxide and zinc metal interact exothermically.
Zinc oxide and copper are created whilst copper(II) oxide and zinc steel engage exothermically. students can turn out to be acquainted with the concept of competitive reactions by using reading about this reaction and its byproducts and noticing the version in reactivity among zinc and copper.
A zinc silver-colored coating paperwork at the penny. The brass alloy coating on the penny turns golden when taken out of the solution and set on the surface of the hot plate. For cleansing concrete, hardware stores sell muriatic acid, regularly referred to as hydrochloric acid (HCl). however, it'll also dissolve the zinc core of a penny, leaving a copper foil with the coin's unique picture.
Learn more about zinc here:- https://brainly.com/question/1594082
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