What Happens when Stuff Dissolves?

TL;DR

When salt, an ionic compound, dissolves in water, the atoms break apart and float individually. Sugar, a covalent compound, dissolves by breaking into individual molecules, which remain intact.

Transcript

What happens when stuff dissolves? I mean like what happens to the atoms and molecules that make it up? I want to talk about two things here you dissolve all the time, salt and sugar. These two things look very similar. They're both like kind of white powders made up of little grains and you can pour both of them into water and stir around and you ... Read More

Key Insights

• ❓ Dissolving depends on whether the substance is an ionic or covalent compound.
• 😑 Ionic compounds, like salt, break apart into individual ions when they dissolve in water.
• 🍳 Covalent compounds, like sugar, break into individual molecules when dissolving, but the molecules themselves remain intact.
• ❓ The appearance of dissolving substances can vary depending on their composition.
• 🧂 Salt grains have a more organized structure compared to the messy appearance of sugar grains.
• 🫀 Covalent compounds do not break apart into individual atoms when they dissolve.
• ❓ The dissolution process differs between ionic and covalent compounds due to their bonding nature.

Questions & Answers

Q: What is the difference between an ionic and covalent compound?

An ionic compound is made of metal and nonmetal ions, while a covalent compound is made of nonmetal atoms bonded together as molecules.

Q: How do the atoms and molecules behave when salt dissolves?

When salt dissolves, the sodium and chloride ions break apart and float individually in the water.

Q: How does sugar dissolve in water?

Sugar dissolves by breaking into individual sugar molecules. These molecules remain intact and float around in the water.

Q: What happens to the molecules when covalent compounds dissolve?

When covalent compounds like sugar dissolve, the molecules separate but stay as intact molecules in the water.

Summary & Key Takeaways

• Salt is an ionic compound made of sodium and chloride ions, while sugar is a covalent compound made of carbon, oxygen, and hydrogen atoms.

• When salt dissolves in water, the sodium and chloride ions separate and float individually.

• When sugar dissolves in water, it breaks into individual sugar molecules which remain intact.