Factors Affecting Dissolving Rate
Grade 7•45 minutes
Learning Objective
I can explain how temperature, surface area, and agitation influence the speed at which a solid dissolves in water, using evidence from an investigation.
Practice Questions
This lesson includes 7 practice questions to reinforce learning.
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1. Define the terms solute, solvent, and solubility. Use the example of sugar dissolving in water to illustrate your definitions.
2. Explain why water is often referred to as the "universal solvent." What property of water molecules makes it effective at dissolving many substances?
3. Describe what happens at the molecular level when salt (NaCl) dissolves in water. Be sure to include the terms "ions" and "polarity" in your explanation.
...and 4 more questions
Educational Video
How Solubility and Dissolving Work
The Science Basement