WarmUp 826 In yesterdays lab were there times
Warm-Up 8/26 • In yesterday’s lab, were there times the temperature stayed the same and didn’t change? If so, when?
Warm-Up 8/24 • Whose law (or principle) describes how we can squeeze the bottom of a tube of toothpaste and get toothpaste out of it?
Warm-up 8/25 • If you add a teaspoon of sugar to a cup of sugar water and it dissolves, what kind of solution were you starting out with?
Solutions
Standards • SPS 6. Students will investigate the properties of solutions. • a. Describe solutions in terms of …solute / solvent, conductivity, concentration • b. Observe factors affecting the rate a solute dissolves in a specific solvent. • c. Demonstrate that solubility is related to temperature by constructing a solubility curve.
Solubility • The maximum amount of a solute that can be dissolved in a given amount of solvent at a given temperature.
Concentration A concentrated solution is one in which a large amount of solute is dissolved in the solvent. A dilute solution is one in which a small amount of solute is dissolved in the solvent.
Solubility of Gases • Increasing pressure causes more gas to dissolve in a liquid. • Decreasing temperature also causes more gas to dissolve in a liquid.
The End
Pressure Activity • Pump bottle 100 times • 1. What happens to the pressure inside the bottle? • 2. What happens to the marshmallows? • 3. What happens when you are finished and you unscrew the bottle top?
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