Bases/Acids with metal oxides

Question 1

What is the aim of the experiment with copper oxide and hydrochloric acid?

Answer 1

To observe the reaction between a metallic oxide (copper oxide) and an acid (HCl)

The experiment aims to demonstrate the properties of metallic oxides when they interact with acids.

Question 2

What materials are required for the reaction between copper oxide and hydrochloric acid?

Answer 2

• Copper(II) oxide (CuO)
• Dilute hydrochloric acid (HCl)
• Beaker
• Stirring rod

These materials facilitate the observation of the chemical reaction.

Question 3

What happens to the color of the solution during the reaction of CuO with HCl?

Answer 3

The solution turns blue-green

This color change indicates the formation of copper(II) chloride (CuCl₂).

Question 4

What is the chemical reaction equation for copper oxide reacting with hydrochloric acid?

Answer 4

CuO (s) + 2HCl (aq) → CuCl₂ (aq) + H₂O (l)

This equation illustrates the reaction of a metallic oxide with an acid.

Question 5

What is the nature of metallic oxides like CuO?

Answer 5

Basic in nature

Metallic oxides neutralize acids, similar to bases.

Question 6

What are metallic oxides also referred to as?

Answer 6

Basic oxides

This term highlights their ability to neutralize acids.

Question 7

List examples of basic metallic oxides.

Answer 7

• Magnesium oxide (MgO)
• Calcium oxide (CaO)
• Sodium oxide (Na₂O)

These oxides demonstrate the basic properties of metallic oxides.

Question 8

What happens when non-metallic oxides react with bases?

Answer 8

They form a salt and water

This reaction is similar to acid-base reactions.

Question 9

What is the chemical reaction that illustrates the reaction of CO₂ with calcium hydroxide?

Answer 9

CO₂ (g) + Ca(OH)₂ (aq) → CaCO₃ (s) + H₂O (l)

This equation shows a non-metallic oxide reacting with a base.

Question 10

What is the nature of non-metallic oxides like CO₂?

Answer 10

Acidic in nature

Non-metallic oxides behave similarly to acids when reacting with bases.

Question 11

List examples of acidic non-metallic oxides.

Answer 11

• CO₂ – carbon dioxide
• SO₂ – sulfur dioxide
• NO₂ – nitrogen dioxide

These oxides exhibit acidic properties.

Question 12

What type of products are formed when a metal oxide reacts with an acid?

Answer 12

Salt and water

This outcome is typical of acid-base reactions.

Question 13

What type of products are formed when a non-metal oxide reacts with a base?

Answer 13

Salt and water

This is consistent with the behavior of acids reacting with bases.

Question 14

Fill in the blank: Metallic oxides react with acids to produce _____ and water.

Answer 14

Salt

This highlights the neutralizing effect of metallic oxides.

Question 15

Fill in the blank: Non-metallic oxides react with bases to produce _____ and water.

Answer 15

Salt

This shows the analogous behavior of non-metallic oxides in reactions.

Question 16

True or False: Metallic oxides are classified as acidic oxides.

Answer 16

False

Metallic oxides are basic in nature, not acidic.

Question 17

True or False: Non-metallic oxides react with bases to form salts.

Answer 17

True

This reaction is characteristic of acidic behavior.