Question

Write a chemical equation for the reaction of:
(1) Iron with steam
(2) Calcium with water and
(3) Potassium with water.

Answer 1

Hint : Chemical equations are symbolic representations of chemical reactions in which the reactants and products are each represented by a chemical equation. Symbols are frequently used to indicate variables such as the reaction's route and the physical responses of the reacting entities.

Complete Step By Step Answer:
A chemical equation is a simplified or abbreviated depiction of a chemical reaction. A chemical equation describes the changes (state, chemical composition, and heat energy) that take place during a chemical process. It is necessary to know the formulae of the elements or compounds involved in the chemical reaction in order to write the chemical equation.
(1) The chemical formula for the interaction of iron with steam is as follows:
 $ 3Fe\left( s \right) + 4{H_2}O \to F{e_3}{O_4} + {H_2} $
 $ Iron{\text{ }} + {\text{ }}Water{\text{ }} \to {\text{ }}Iron{\text{ }}\left( {II,{\text{ }}III} \right){\text{ }}oxide{\text{ }} + {\text{ }}hydrogen{\text{ }}gas $
When red hot iron reacts with steam, $ iron\left( {II,{\text{ }}III} \right) $ oxide and hydrogen are formed. Metal oxide and hydrogen gas are the by-products of an iron metal's interaction with steam.
(2) The chemical equation for calcium's reaction with water is as follows:
Metal hydroxide and hydrogen gas are the by-products of a metal's interaction with water.
 $ Metal{\text{ }} + {\text{ }}steam{\text{ }} \to {\text{ }}Metal{\text{ }}hydroxide{\text{ }} + {\text{ }}Hydrogen $
Calcium hydroxide and hydrogen gas are formed when calcium combines with cold water.
 $ Ca\left( s \right) + {\text{ }}2{H_2}O\left( l \right){\text{ }} \to {\text{ }}Ca{\left( {OH} \right)_2}\left( {aq} \right){\text{ }} + {\text{ }}{H_2}\left( g \right) $
(3) The chemical equation for potassium's reaction with water is as follows:
Potassium interacts violently with cold water to generate potassium hydroxide and hydrogen gas.
The method generates so much heat that the hydrogen gas produced catches fire and burns quickly.
 $ 2K\left( s \right) + {\text{ }}2{H_2}O\left( l \right){\text{ }} \to {\text{ }}2KOH\left( {aq} \right){\text{ }} + {\text{ }}{H_2}\left( g \right){\text{ }} + {\text{ }}heat. $

Note :
Chemical reactions aid our understanding of matter's qualities. We can learn about a sample's chemical properties by looking at how it interacts with other materials. These characteristics can be used to identify an unknown specimen or anticipate how different forms of materials will interact. A chemical reaction is simply the most important discovery made by humans.