What is a neutralisation reaction in Science?

Neutralisation refers to a chemical process in which an acid reacts with a base to produce salt and water. In this reaction, the acidic nature and basic nature of both chemicals are neutralised, thus giving a neutral solution.

What is the general equation for a neutralisation reaction?

General chemical formula for a neutralisation reaction: Acid + Base → Salt + Water For example, when hydrochloric acid (HCl) and sodium hydroxide (NaOH) react, they create sodium chloride (NaCl) or table salt and water (H2O). An acid and a base make two entirely new substances.

What are some common real-life examples of neutralisation reactions?

If anyone suffers from excess acids or indigestion, then he or she consumes antacids that contain some amount of base so as to compensate for the excess acids in the stomach. Limewater is used by farmers as a base material in the soil so as to neutralise any acid in the soil that may hamper crop production. Moreover, baking soda can also be used while cooking to neutralise the acids.

What is the role of indicators in identifying a neutralisation reaction?

These are chemical substances that change colour in specific ways when added to an acid or base to determine whether neutralisation has occurred. Examples include: Litmus Paper, Phenolphthalein, and Turmeric. Litmus Paper will change from red to blue in a basic solution, but remain red in an acidic solution.

Why is the neutralisation reaction important in daily life and industry?

Neutralisation reactions are very significant in day-to-day activities and industrial applications. 1. The use of antacids for treating excessive acid in the stomach utilises neutralisation in the medical field. 2. Agriculture uses neutralisation to balance the soil’s pH value to make it appropriate for cultivation. 3. Industrial effluents from factories are rendered harmless through neutralisation at wastewater treatment facilities before being released into the ecosystem. 4. Controlling the pH of foods in the food industry.

What Is Neutralisation Reaction? Give Two Examples (Class 7 Guide)

Welcome to the fascinating world of Chemistry! If you are a middle school student studying acids and bases, you are likely looking for a clear answer to the common exam question: What is Neutralisation reaction? Give two examples (Class 7).

Science can sometimes feel like a puzzle, but understanding how chemicals interact is actually quite simple and incredibly relevant to our daily lives. In this blog post, we will break down the exact definition of a neutralisation reaction, provide the core formula, and explore two easy-to-remember examples perfect for your Class 7 science exams.

What Is a Neutralisation Reaction?

A neutralisation reaction is a chemical reaction in which an acid reacts with a base to form salt and water. In this reaction, an acid and a base completely cancel each other's effects. When you mix an acidic solution with a basic solution in the right amounts, they destroy each other's chemical properties. Consequently, the mixture is no longer acidic or basic; it becomes neutral. During this process, two new substances are always produced: salt and water. Additionally, this reaction releases heat. Here is the general word equation:

Acid + Base → Salt + Water

Heat is also released in this process.

Give Two Examples of Neutralisation Reactions (Class 7)

Here are two practical examples. One happens in a science lab, and the other happens right inside your own body:

Example 1: Hydrochloric Acid and Sodium Hydroxide

When you mix Hydrochloric Acid (a strong acid) with Sodium Hydroxide (a strong base), they neutralise to form sodium chloride (regular table salt) and water. Here is the chemical equation:

HCl + NaOH → NaCl + H₂O

Acid: HCl (Hydrochloric acid)
Base: NaOH (Sodium hydroxide)
Salt: NaCl (Sodium chloride)
Water: H₂O

Example 2: Curing Acidity or Indigestion

Did you know your stomach produces Hydrochloric Acid to help digest food? However, sometimes it produces too much acid, leading to a painful condition called Indigestion or Acidity.

To cure this, we take an antacid tablet or liquid. This antacid contains Magnesium Hydroxide [Mg(OH)₂], which is a mild base. Therefore, when you swallow the basic antacid, it reacts with the excess stomach acid. The base neutralises the acid, giving you quick relief from the pain.

Why Does Neutralisation Matter?

Neutralisation reactions are not just for passing your Class 7 science tests; they are happening all around you. Here are a few more quick everyday applications:

Treating Ant Bites: An ant bite injects formic acid into your skin. Rubbing moist baking soda (a base) on the bite neutralises the acid and stops the stinging.
Treating Factory Waste: Many factories produce acidic waste. If dumped directly into rivers, it would harm fish. Factories treat the waste with basic chemicals to neutralise it before releasing it.
Soil Treatment: Farmers use quicklime (a base) to neutralise soil that has become too acidic for plants to grow.

Summary for Your Exams

If you get stuck on the question "What is neutralisation reaction? Give two examples (Class 7)," just remember:

Neutralisation Definition: Acid + Base = Salt + Water (and heat is released).
Neutralisation Examples:
1. Mixing Hydrochloric Acid and Sodium Hydroxide creates table salt and water.
2. Using a basic antacid to cure acidic indigestion in your stomach.
Neutralisation Applications:
1. Rubbing moist baking soda (a base) on the ant bite neutralises the acid.
2. Factories treat the acidic waste with basic chemicals to neutralise it.
3. Farmers use quicklime (a base) to neutralise soil that has become too acidic.

By understanding the mechanics behind these reactions, you are one step closer to mastering Class 7 chemistry. Check out our Online CBSE Class 7 Course for all subjects and download free Study Resources for Class 7, like NCERT Solutions, Sample Papers, PYQs, Syllabus, Important Questions, Assignments, Notes, etc.