Question

Write the word equation and the chemical equation and also state the kind of change when magnesium oxide is dissolved in water.

Answer 1

Hint: Generally in chemical equations, the precursors present in the left side of the arrow are known as reactants and the substances formed which are present in the right side of the arrow are known as products. A word equation is written by spelling out the reactants and products of the reaction separated by an arrow. A chemical equation is written using the symbols of reactants and products of the reaction.

Complete answer:
We have to know that a word equation should express the reactants (beginning materials), items (finishing materials), and course of the reaction in a structure that could be utilized to compose a chemical equation.
There are some watchwords to look for when perusing or composing a word equation. The words "and" or "in addition to" mean one compound and another are the two reactants or products. The expression "is reacted with" demonstrates the substances are reactants. On the off chance that you say "forms", "makes", or "yields", it implies the accompanying substances are products.
So, the given statement is that magnesium oxide is dissolved in water. In this statement, the reactants are magnesium oxide and water. So, when magnesium oxide reacts with water, the product formed would be magnesium hydroxide. So, we can say that the reactants are magnesium oxide and water. The product is magnesium hydroxide. We can write the word equation as,
${\text{Magnesium}}\,{\text{oxide + Water}} \to {\text{Magnesium}}\,{\text{hydroxide}}$
We can express in chemical equation as,
The chemical representation of magnesium oxide is $MgO$.
The chemical representation of water is ${H_2}O$.
The chemical representation of magnesium hydroxide is $Mg{\left( {OH} \right)_2}$.
${\text{MgO + }}{{\text{H}}_{\text{2}}}{\text{O}}\overset {} \leftrightarrows {\text{Mg}}{\left( {{\text{OH}}} \right)_{\text{2}}}$
We can say that the reaction of magnesium oxide with water is a chemical change because a new substance is formed when magnesium oxide is reacted with water.

Note:
We have to know that a word equation could represent the sequence of events happening in a chemical reaction. The amount of moles and type of reactants gives the amount of moles and types of products. We should not use letters, operators, and numbers while writing a word equation.