Today we made ice cream so if you missed class you missed out. The experience of making ice cream showed us many things about freezing point depression. Through our experiment we learned that when you add a solute to a solvent you lower the freezing point and increase the boiling point. Two example of this are when we put salt on sidewalks to prevent ice freezing on them (freezing point depression) and adding salt to water (increasing the boiling temperature of water) to cook pasta faster.
Try this link if you missed the experiment or want to try some more at home.
- Boiling point and freezing point depression experiment
After our little activity we began to learn about concentration and dilutes. The following terms are important...
concentrate - more solute is dissolved into the solvent. You can usually tell if it is dark in color. Ex. Think about a concentrated juices at the grocery store or the maple syrup example we used in class.
dilute - less solute is dissolved into the solvent. This is usually apparent if the mixture is lighter in color. Things are often diluted when you add more solvent to the solution. The image below illustrates this point.
Try this link if you missed the experiment or want to try some more at home.
- Boiling point and freezing point depression experiment
After our little activity we began to learn about concentration and dilutes. The following terms are important...
concentrate - more solute is dissolved into the solvent. You can usually tell if it is dark in color. Ex. Think about a concentrated juices at the grocery store or the maple syrup example we used in class.
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| Photo courtesy of www.maplecommunity.com |
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| Image courtesy of http://water.me.vccs.edu |
On Tuesday we will learn how to calculate the concentration of a solution and learn about solubility or certain solutes. Solubility refers to how well something (the solute) dissolves (in the solvent). Have a nice weekend!
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