watch the following video on solutions. Do you have any questions?
Categorize the behaviors of different mixtures
Particles in the liquid can be filtered out
particles in the liquid will settle over time
Particles in liquid won't settle, but the mixture is still heterogeneous
particles in the liquid do not scatter light
particles in the liquid are mixed at a molecular level. Single molecules or atoms are between molecules of the liquid
particles in the liquid are too small to be filtered but large enough to scatter light
Suspension
Solution
colloid
Categorize the types of mixtures
muddy water
salt water
sugar water
OIl and vinegar salad dressing
glue
milk
Suspension
Solution
colloid
Watch the following video
do you have any questions?
match the vocab word to a definition
| Stavka koja se može prevući | arrow_right_alt | Odgovarajuća stavka |
|---|---|---|
Solvent | arrow_right_alt | a homogenous mixture where one substance is mixed with another at a molecular level. The mixture doesn't settle over time, it cannot be filtered out, and it does not scatter light. |
solute | arrow_right_alt | The fluid that will dissolve a substance (the water in salt water) |
Supersaturation | arrow_right_alt | the substance being dissolved (the salt in salt water) |
Solution | arrow_right_alt | how much solute is in the solution per unit of solvent |
unsaturated | arrow_right_alt | when a solvent is holding the maximum amount of solute |
Saturated | arrow_right_alt | When a solution has been heated, brought to saturation, and then allowed to cool without the solute coming out of solution. |
concentration | arrow_right_alt | solute that comes out of solution |
precipitate | arrow_right_alt | a solution that can dissolve more solute |
6th and 7th graders - you are free to go. 8th graders - answer the following questions
What happens at a molecular level when you heat a liquid that allows the liquid to dissolve more solute? You may have to research this online.
Stirring will not increase the saturation of a solvent at a certain temperature, but it will make the solute dissolve faster. Can you think why that is?
Increasing the temperature of a solvent will not only increase how much solute you can dissolve, but will make the solute dissolve faster. Can you think why that is?
We will have a discussion in class where the 8th graders try to explain these phenomenon. how comfortable are you with your explanations?