Question

Write the word equation and the chemical equation for the change when carbon dioxide is passed through lime water.

Answer 1

Hint: Word equation means we have to write the chemical reaction in the form of words. Chemical reaction means we have to mention the chemical symbols of the elements to represent the reaction. Calcium hydroxide is called lime water. Carbon dioxide turns lime water to milky.

Complete step by step answer:
- In the question it is asked to write the word equation and chemical equation when carbon dioxide is passed through lime water.
- The molecular formula of carbon dioxide is $C{{O}_{2}}$ .
- The molecular formula of lime water is $Ca{{(OH)}_{2}}$ .
- When carbon dioxide reacts with lime water, a white precipitate of calcium carbonate and water are going to form as the products.
- The reaction in the form of the word equation is as follows.
Carbon dioxide + calcium hydroxide $\to $ calcium carbonate + water
- The chemical reaction of carbon dioxide react with lime water is as follows.
\[C{{O}_{2}}+Ca{{(OH)}_{2}}\to CaC{{O}_{3}}+{{H}_{2}}O\]
- To detect the presence of carbon dioxide, lime water is used.
- Lime water turns to milky when carbon dioxide is passed through it.

Note: Lime water is nothing but the dissolution of the calcium hydroxide in a certain amount of water. In the above reaction the change is chemical change. Because we can see clearly that the reactants and the products involved in the reaction are different. If a change happens chemically means the composition of the chemical changes then it is called a chemical change.