What happens when Acids react with metals and metal oxide. Give one example of both types of reaction.
Answers
•Acids react with most metals to form hydrogen gas and a salt. Nevertheless, not all metals react in the same way to acids. When an acid reacts with metal, salt and hydrogen gas are produced.
•When metallic oxide reacts with acid,salt and hydrogen gas is formed. Metal oxides are basic in nature therefore they are also called as basic oxides. For example - when lead oxide (metallic oxide)reacts with Nitric acid(acid) it gives lead nitrate and water.
Example
Zinc powder reacts with hydrochloric acid that releasesH2 gas and zinc chloride.
Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)
The salt that is produced depends upon acid and metal reacting.
Metals react with dilute hydrochloric acid to form the corresponding chloride salt and hydrogen which is evolved as bubbles. The rate of formation of bubbles was the fastest in the case of magnesium.
The reaction was also the exothermic reaction and the reactivity decreases in the order.
Example
Zinc powder reacts with hydrochloric acid that releasesH2 gas and zinc chloride.
Zn(s)+2HCl(aq)→ZnCl2(aq)+H2(g)
The salt that is produced depends upon acid and metal reacting.
Metals react with dilute hydrochloric acid to form the corresponding chloride salt and hydrogen which is evolved as bubbles. The rate of formation of bubbles was the fastest in the case of magnesium.
The reaction was also the exothermic reaction and the reactivity decreases in the order
Mg > Al> Zn > Fe.
Metallic oxides react with acids to give salts and water. Let us consider the reaction of copper oxide with dilute hydrochloric acid. After the reaction takes place the colour of the solution becomes blue-green due to the formation of copper
chloride and the copper oxide dissolves.
Or we can say-
Acids react with metal oxides to produce a salt and water.
Acid + metal oxide ⟶ salt + water
For example:
2HCl+CuO⟶CuCl2+H2O