Water as Universal Solvent Lab Quiz

Did all the substances dissolve in water?

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NGSS.MS-PS1-2

Which substances did not dissolve in water?

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What is a polar molecule?

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NGSS.MS-PS1-1

Draw a water molecule with the correct molecular shape.

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NGSS.MS-PS1-1

Define hydrophobic and hydrophilic. Which substances tested were hydrophobic?

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What is a solvent? Which substance(s) are considered a solvent?

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What is a solute? Which substances are considered solutes?

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What is the primary concept being explored in the cohesion lab experiment?

• The attraction between water molecules and other substances

• The tendency of water molecules to form droplets due to surface tension

• The ability of water molecules to stick together

• The effect of gravity on the cohesion of water droplets

What is the purpose of using a dry penny in the cohesion experiment?

• To measure the weight of the penny accurately

• To prevent water absorption by the penny

• To create a surface with low cohesion for comparison

• To ensure the penny does not interact with the water molecules

How does the number of drops a penny can hold before overflowing relate to the concept of cohesion?

• More drops indicate higher adhesion between the penny and water

• More drops indicate higher cohesion between the water molecules

• Fewer drops indicate higher adhesion between the water molecules

• Fewer drops indicate higher cohesion between the penny and water.