Solutions. Solution: a mixture that has the same composition, color, and density throughout Solute: The substance being dissolved Most are solids Solvent:

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Presentation transcript:

Solutions

Solution: a mixture that has the same composition, color, and density throughout Solute: The substance being dissolved Most are solids Solvent: The substance doing the dissolving Water is the universal solvent

How it works The solvent surrounds the solute and separates molecules or ions pulling them into the solution. Salt water animation

Liquid Solutions Solid in liquid: Solute is solid, solvent is liquid. Salt water, Kool-Aid Gas in liquid: Solute is gas, solvent is liquid. CO 2 in pop, carbonated water Liquid in liquid: Both solute & solvent are liquid Gasoline

Nonliquid solutions Solid in solid: Both solute & solvent are solids Alloys/amalgams: brass, stainless steel, sterling silver Gas in gas: Solute & solvent are gases Air

Rate of Dissolving Solids How to speed up the dissolving of a solid solute: Stirring: brings fresh solvent in contact with the solute. Crystal Size: smaller particles have a larger exposed surface area. Larger particles have solute trapped inside not exposed to the solvent Temperature: solids dissolve faster at higher temperatures because solvent particles bump into the solute more rapidly.

Rates for Gas Solutes Stirring/Shaking: slows down the dissolving process & can cause gas to come out of solution Temperature: more gas dissolves when colder Warm temperatures cause gas to leave, making the solution flat Pressure: Higher pressures increase the amount of CO 2 that dissolves in the liquid. When pressure is released, the CO 2 bubbles out.

Mentos + Soda = ? Spangler Science Jack Thorne Soda and Mentos EepyBird--

Coke Zero Rocket car The Domino Effect--