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Solutions

Solutions. Basic Vocabulary Factors that affect the rate of dissolution. Solution Vocabulary. Solution – a uniform mixture that can contain solids, liquids or gases Solution = Solute + Solvent Solute – one or more substances dissolved in a solution

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Solutions

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  1. Solutions Basic Vocabulary Factors that affect the rate of dissolution

  2. Solution Vocabulary • Solution – a uniform mixture that can contain solids, liquids or gases Solution = Solute + Solvent • Solute – one or more substances dissolved in a solution • Solvent – the substance that dissolves a solute to form a solution; the most plentiful substance in the solution

  3. Would the salt or the water be the solute in a salt-water solution?

  4. Solution Vocabulary • Aqueous Solution – a solution in which the solvent is water • Miscible – describes two liquids that are soluble in each other • Immiscible – describes two liquids that are not soluble in each other • Dissolution – how fast the solute dissolves in the solvent

  5. Experiment Time • Numbers 1, 2 and 3 • 1 – only let the Smarties sit on your tongue • 2 – only swirl it around in your mouth • 3 – chew • When yours is gone raise your hand

  6. Factors that affect the rate of dissolution • Temperature • Stirring/Agitation • Surface Area

  7. Temperature • For Solids: • Increase the temperature, increase rate of solute dissolving • Ex: sugar in tea to make sweet tea • Opposite for Gases!! • Increase temperature, decrease rate of solute dissolving • Ex: a carbonated soft drink will lose its fizz (CO2) faster at room temperature

  8. Stirring/ Agitation • Stirring or agitation • moves dissolved solute particles away from the contact surfaces more quickly • allows new collisions between solute and solvent particles to occur

  9. Surface Area • Larger surface area allows more collisions to occur • Which dissolves faster? Why? a teaspoon of granulated sugar cube or a sugar cube

  10. Breaking It Down Activity

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