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S3W3 Homework: What are solutions?

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Last updated 5 months ago
9 questions
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Question 1
1.

watch the following video on solutions. Do you have any questions?

Question 2
2.

Categorize the behaviors of different mixtures

  • particles in the liquid will settle over time
  • Particles in the liquid can be filtered out
  • particles in the liquid do not scatter light
  • Particles in liquid won't settle, but the mixture is still heterogeneous
  • 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
Question 3
3.

Categorize the types of mixtures

  • muddy water
  • salt water
  • sugar water
  • OIl and vinegar salad dressing
  • milk
  • glue
  • Suspension
  • Solution
  • colloid
Question 4
4.

Watch the following video
do you have any questions?

Question 5
5.

match the vocab word to a definition

Draggable itemarrow_right_altCorresponding Item
unsaturated
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.
Solvent
arrow_right_alt
The fluid that will dissolve a substance (the water in salt water)
Solution
arrow_right_alt
the substance being dissolved (the salt in salt water)
precipitate
arrow_right_alt
how much solute is in the solution per unit of solvent
concentration
arrow_right_alt
when a solvent is holding the maximum amount of solute
Supersaturation
arrow_right_alt
When a solution has been heated, brought to saturation, and then allowed to cool without the solute coming out of solution.
Saturated
arrow_right_alt
solute that comes out of solution
solute
arrow_right_alt
a solution that can dissolve more solute
Question 6
6.

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.

Question 7
7.

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?

Question 8
8.

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?

Question 9
9.

We will have a discussion in class where the 8th graders try to explain these phenomenon. how comfortable are you with your explanations?