2.1.5 - Reaction of Metallic Oxides with Acids

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Introduction to Metallic Oxides

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Teacher
Teacher

Today, we are going to discuss how metallic oxides react with acids. Can anyone tell me what a metallic oxide is?

Student 1
Student 1

A metallic oxide is a chemical compound made from a metal and oxygen!

Teacher
Teacher

Exactly! So, when a metallic oxide reacts with an acid, what do you think happens?

Student 2
Student 2

Do they form salts and water?

Teacher
Teacher

Yes, that's correct! The general reaction is: Metal oxide + Acid → Salt + Water. To remember this, think 'MAWS'—Metallic Oxide + Acid = Water and Salt.

Student 3
Student 3

What does 'water and salt' mean in this context?

Teacher
Teacher

Good question! It means we create a salt, which is the result of the acid and the metallic oxide reacting together and water. Let's look at an example.

Example Reaction: Copper Oxide and Hydrochloric Acid

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Teacher
Teacher

Let’s take copper oxide and hydrochloric acid as an example. What do you think will happen when we mix them?

Student 4
Student 4

Will it dissolve and turn blue?

Teacher
Teacher

Yes! When you add hydrochloric acid to copper oxide, the copper oxide dissolves and you get a blue-green solution of copper(II) chloride.

Student 1
Student 1

Why does it turn blue-green?

Teacher
Teacher

That's because copper(II) chloride is blue-green. It's a nice visual example of how we can see the reaction happening!

Student 2
Student 2

So, does that mean copper oxide is a basic oxide?

Teacher
Teacher

Exactly! Because it reacts like a base with an acid. Remember that metallic oxides are indeed basic oxides.

Balancing Chemical Equations

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Teacher
Teacher

Now, let's talk about how to write and balance the equation for the reaction we just discussed.

Student 3
Student 3

What is the equation for the copper oxide and hydrochloric acid reaction?

Teacher
Teacher

"The reaction can be shown as:

Introduction & Overview

Read a summary of the section's main ideas. Choose from Basic, Medium, or Detailed.

Quick Overview

This section explains how metallic oxides react with acids to form salts and water.

Standard

In this section, we explore the reaction of metallic oxides, which are basic in nature, with acids. The key outcome of this reaction is the formation of salts and water, reinforcing the concept that metallic oxides behave like bases.

Detailed

In the reaction between metallic oxides and acids, metallic oxides, such as copper oxide, combine with acidic solutions, resulting in the production of salts and water. For example, when copper oxide reacts with hydrochloric acid, it dissolves to form copper(II) chloride, which is a blue-green solution. The general reaction can be summarized as: 

Metal oxide + Acid → Salt + Water.

This concept reinforces that metallic oxides are basic oxides and exhibit behaviors similar to those of bases in their reactions with acids. Understanding these reactions is fundamental in comprehending the broader principles of acid-base interactions.

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Audio Book

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Introduction to the Reaction

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Take a small amount of copper oxide in a beaker and add dilute hydrochloric acid slowly while stirring.

Detailed Explanation

In this step, we are starting an experiment with copper oxide and hydrochloric acid. Copper oxide is a type of metallic oxide. When we add the acid to the copper oxide, it's important to do so slowly and stir the mixture to allow the reaction to occur properly. The method involves observing how the materials mix together and what changes happen during this process.

Examples & Analogies

Think of it like making a smoothie. You add fruit (copper oxide) to milk (hydrochloric acid) slowly and blend (stir) it. You notice how the mixture changes color and texture as you combine them.

Observation of Color Change

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Note the colour of the solution. What has happened to the copper oxide?

Detailed Explanation

As you mix the copper oxide with hydrochloric acid, you should observe that the color of the solution changes to blue-green. This color indicates that a reaction is taking place, resulting in the formation of a new compound, copper(II) chloride, dissolved in the solution. The copper oxide actually dissolves in the acid, transforming the initial solid into a liquid.

Examples & Analogies

Imagine adding sugar (copper oxide) to water (hydrochloric acid). At first, the sugar is solid and doesn't mix in. But as you stir, it dissolves and changes the appearance of the water. This is similar to what happens in this chemical reaction.

General Reaction Equation

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The general reaction between a metal oxide and an acid can be written as –

Metal oxide + Acid → Salt + Water

Detailed Explanation

This equation summarizes what happens in the reaction between metal oxides and acids. In this case, copper oxide (the metal oxide) reacts with hydrochloric acid to produce copper(II) chloride (the salt) and water. The concept of acids reacting with metal oxides is similar to how bases react with acids. Metal oxides are classified as basic oxides because they exhibit behavior similar to that of bases in their reactions with acids.

Examples & Analogies

Consider baking soda (a base) reacting with vinegar (an acid) to produce carbon dioxide gas, water, and a salt. Just like that, metal oxides also undergo a reaction with acids, producing a salt and water.

Classification of Metallic Oxides

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Since metallic oxides react with acids to give salts and water, similar to the reaction of a base with an acid, metallic oxides are said to be basic oxides.

Detailed Explanation

Metallic oxides are categorized as basic oxides because they follow the same principles as bases when they react with acids. Their capacity to neutralize acids and produce salt and water during reactions confirms their basic nature. This is a critical feature for understanding how different compounds behave chemically.

Examples & Analogies

Imagine how an antacid (acting as a base) neutralizes stomach acid for relief. Basic oxides do this in a similar way when they interact with acids, helping us understand the broader category of acids and bases.

Definitions & Key Concepts

Learn essential terms and foundational ideas that form the basis of the topic.

Key Concepts

  • Metallic Oxides: Compounds formed by a metal and oxygen that can react with acids.

  • Reaction with Acids: Metallic oxides react with acids to form salts and water.

  • Basic Oxides: Metallic oxides are considered basic due to their ability to neutralize acids.

Examples & Real-Life Applications

See how the concepts apply in real-world scenarios to understand their practical implications.

Examples

  • Copper oxide reacting with hydrochloric acid produces copper(II) chloride and water.

  • Zinc oxide reacting with sulfuric acid produces zinc sulfate and water.

Memory Aids

Use mnemonics, acronyms, or visual cues to help remember key information more easily.

🎵 Rhymes Time

  • Metal oxide and acid mix, to create salts, a handy fix!

📖 Fascinating Stories

  • Imagine a colorful potion turning blue-green. That's copper oxide meeting hydrochloric acid, producing something new!

🧠 Other Memory Gems

  • Think 'MAWS': Metal Oxide + Acid = Water and Salt.

🎯 Super Acronyms

MOS

  • Metal Oxides are Salts when they react with acids.

Flash Cards

Review key concepts with flashcards.

Glossary of Terms

Review the Definitions for terms.

  • Term: Metallic Oxides

    Definition:

    Compounds formed by the combination of a metal and oxygen, often basic in nature.

  • Term: Salts

    Definition:

    Ionic compounds formed from the neutralization reaction between an acid and a base.

  • Term: Hydrochloric Acid

    Definition:

    A strong acid commonly used in reactions with metals and oxides.

  • Term: Copper(II) Chloride

    Definition:

    A blue-green salt formed when copper oxide reacts with hydrochloric acid.