Ionic Properties and Conductivity Concepts

This lesson introduces solubility and conductivity, focusing on sugar and ionic substances. It explains how sugar, a non-ionic substance, dissolves in water but does not conduct electricity, making it a non-electrolyte. In contrast, ionic substances dissolve into ions, enabling them to conduct electricity and act as electrolytes. The video also covers the basics of electrical circuits and the importance of ions in conductivity.

What is the nature of sugar in terms of its ionic properties?

• Sugar is non-ionic and does not form a crystal lattice.

• Sugar is non-ionic but forms a crystal lattice.

• Sugar is ionic and forms a crystal lattice.

• Sugar is partially ionic and forms a partial lattice.

What does it mean for a substance to be soluble?

• It cannot conduct electricity.

• It can conduct electricity.

• It cannot be dissolved in water.

• It can be dissolved in water.

How do water molecules interact with ionic substances?

• Water molecules repel ionic substances.

• Water molecules do not interact with ionic substances.

• Water molecules attract only the positive ions.

• Water molecules surround and attract both positive and negative ions.

What is necessary for a light bulb to shine in an electrical circuit?

• A circuit with only positive ions.

• A circuit with only negative ions.

• A complete circuit.

• A broken circuit.

Why does a sugar solution not conduct electricity?

• Because sugar does not dissolve in water.

• Because sugar does not have ions.

• Because sugar forms a complete circuit.

• Because sugar has ions.

What is a non-electrolyte?

• A solid that conducts electricity.

• A gas that conducts electricity.

• A solution that can conduct electricity.

• A solution that cannot conduct electricity.

What happens when an ionic substance is dissolved in water?

• It evaporates.

• It remains as a solid.

• It forms ions that can conduct electricity.

• It forms a non-conductive solution.

What is an electrolyte?

• A solid that conducts electricity.

• A solution that cannot conduct electricity.

• A gas that conducts electricity.

• A solution that can conduct electricity.

How does increasing ion concentration affect conductivity?

• It stops conductivity.

• It increases conductivity.

• It has no effect on conductivity.

• It decreases conductivity.

What is the role of ions in conducting electricity?

• Ions only conduct electricity in solid form.

• Ions have no role in electricity conduction.

• Ions facilitate the flow of electricity.

• Ions block the flow of electricity.