Chemistry > GIZMOS > Student Exploration: Colligative Properties GIZMO ( ALL ANSWERS CORRECT ) (All)

Student Exploration: Colligative Properties GIZMO ( ALL ANSWERS CORRECT )

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Student Exploration: Colligative Properties Vocabulary: boiling point, colligative property, concentration, dissociate, freezing point, manometer, osmosis, osmotic pressure, solute, solution, solven... t, vapor pressure Prior Knowledge Questions (Do these BEFORE using the Gizmo.) 1. When the forecast calls for freezing rain, salt is often spread on the roads. Why is this done? So the water doesn’t freeze as quickly. 2. Antifreeze is added to car radiators to prevent the water in the radiators from both freezing and boiling. How do you think antifreeze affects the temperatures at which water freezes (the freezing point) and boils (the boiling point)? The anti-freeze most likely has a liquid that has a very high boiling and freezing point and they combine it with the water so water has similar properties . Gizmo Warm-up Adding salt or other substances to water can affect the temperature at which it freezes or boils. These effects and others, known as colligative properties, are explored in the Colligative Properties Gizmo™. Check that No solute is selected and the Air temp is 25 °C. 1. Describe the motion of the water molecules in the beaker. The water molecules are bumping into each other more than the air molecules. 2. Change the Air temp to -10 °C. What do you see as the water freezes? The molecules stay in one place and the air molecules stayed the same. 3. Now change the Air temp to 110 °C. What do you see as the water boils? the molecules are moving really fast [Show More]

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