🔍 Key Concepts

• Electrical conductivity depends on the presence of free ions or charged particles • Pure (distilled) water vs water that contains dissolved salts/minerals • Gases like carbon dioxide compared with liquids in conducting electricity

💭 Think About

• Which option contains the most ions that can move freely to carry electric current? • How does adding salt to water change its ability to conduct electricity compared with pure water? • Among gas, pure liquid, and impure liquid, which general state and composition usually gives the highest conductivity?

✅ Before You Answer

• Compare each choice by its ion content (charged particles in solution or medium) • Remember that pure distilled water has very few ions compared with natural waters • Consider that dissolved salts break into ions that greatly increase conductivity