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Stir sugar into tea. It vanishes. Yet every sip is sweet.

This is Chapter 9, The Amazing World of Solutes, Solvents, and Solutions.

What you will learn

• Three words — solute, solvent and solution.
• What water dissolves — and what it does not.
• How much goes in — every solvent has a limit.
• Warmth — it moves the limit.
• Saturated — a glass at its limit.
• Concentration — how strong a solution is.
• Uniform or not — solutions and other mixtures.
• Density — the mass in each cm³.
• Float or sink — compare the density with the liquid.

Need a quick recap?

• Gaps between them (Particulate Nature of Matter) — gaps sit between particles.
• Does it dissolve? (Materials Around Us) — some solids dissolve, some do not.
• Dissolving (Changes Around Us) — dry the water and the grains return.

Stay safe

Nothing here is real material. Every glass is on the screen. Never taste a lab material.