Pure Substances and Mixtures WebQuest

Introduction

Pure Substances and Mixtures

Have you ever wondered about what the difference was between saturation and supersaturation, or who proposed the idea of particle theory? Well, once you're finished this WebQuest, you will know!

This WebQuest focuses on pure substances and mixtures. It covers everything from the states of matter to ways you can seperate mixtures! Once you're done, you'll be an expert in the field of pure substances and mixtures!

In this WebQuest, you will be exploring the science unit, Pure Substances, and Mixtures.  Over the length of this WebQuest, you will discover many interesting things from how to separate mixtures and solutions to what is the particle theory?. Through experiments, you will learn what is saturation and also all about solubility and the factors that affect it. Let’s go and learn some science!!!!

Process

Part 1

First, go to this webpage

https://www.bbc.co.uk/education/guides/zgvc4wx/revision/1

Read at pages 1, 2, 3 and In your own words describe filtration, evaporation, and distillation. Then put an example of each of these ways to separate

Part 2

Watch this video https://www.youtube.com/watch?v=KORaKEYU9LU  and reflect on the first four methods of separating. Choose one of the four methods and attempt it. Once you have attempted the separation write two or more sentences on what you would do differently or how to improve the experiment.

Part 1

In this task, you will learn all about solubility. Before beginning the following experiment, look at this article to give you a basic understanding of what you are going to learn about; Solubility: https://www.sciencedaily.com/terms/solubility.htm

First, try mixing salt in 3 different cups. In the first cup, put cold water. In the second cup, put room temperature water. In the last cup, put warm water. See how long it takes to mix the salt in each cup.

Before doing this, research and write a hypothesis for each cup of water. After the experiment, document your results and see if you were right! Also, write out the results of the experiment afterward and compare them to your predictions! Here is a good tool for some of your research: http://bit.ly/2BpGzYi (It is a PDF and probably will download to your computer automatically)

If you weren't able to mix in the salt completely, that is ok! This may just be saturation/ supersaturation, which you will learn about in part 2 of this task! Document this and why you think it happened!

Part 2

In this task, you will learn about saturation. Just like part 1 of this task, you will research your topic before doing the experiment! Please refer to definition 2 on this website, as the other definitions are not about this kind of saturation. Website: https://www.thoughtco.com/definition-of-saturated-in-chemistry-604645

First, get a cup of water. The water has to be hot, but not boiling. Stir salt into the water until it dissolves keep adding more salt and continue stirring until the salt won't dissolve.

When the salt can no longer be absorbed this is called saturation. If there is too much salt, this is called supersaturation because there is too much of the solute in the solvent to absorb. Make sure to keep measurements for much water is in the cup (Or measure out exactly 1 cup), and how much salt goes into the water.

When the salt stops to dissolve, you know you have reached the maximum amount of solute in the solvent. You now have a "saturated solution". Next, take the amount of salt and compare it to the amount of water you had in the cup. What do you notice? Document it!

Part 1:

The first part of your third task has to do with particle theory.

Your job is to identify the three basic forms of matter, come up with (in your own words) a few important rules of particle theory, and find five ways for matter to change state. For each of the three basic forms, give three examples of each. Next, go to this link and devise your rules. http://www.edu.pe.ca/queencharlotte/homework/mmorrison/9science/matter/section2_1.pdf  After, find five processes that change the state of a particle. Give an example for each. You can find them here. https://quizlet.com/14205852/the-particle-theory-of-matter-flash-cards/ Lastly, find two other forms of matter. Give an example for each. Go to the previous link to find them.

Part 2:

The second part of the third task has to do with pure substances and mixtures.

Your job is to find the differences between a pure substance and a mixture, find the classification of both kinds of mixtures, and compare both kinds of mixtures in a Venn diagram. Once you're done, find at least 3 household examples of all the kinds of substances: pure substances, and both kinds of mixtures. You can find the classifications here, on pages 20, 24 and 25: http://www.nelson.com/perspectives/7/flash/document.pdf

Bonus:

Who proposed the idea of particle theory in the 19th century?

Good luck!

Evaluation

 Criteria Level 1 Level 2 Level 3 Level 4 Clearly explains all three types of separation and uses complex scientific language Student shows detailed understanding of first four methods in video Puts time and effort into the  experiments performed

 Criteria Level 1 Level 2 Level 3 Level 4 Student wrote each hypothesis with effort and used multiple resources to backup their predictions Student put little to no effort into each hypothesis and uses no resources to backup their predictions Student put some effort into their hypothesis and uses just 1 resource to make their predictions Student put a decent amount of effort into writing each hypothesis and uses 2-3 resources to make their predictions Student put full effort into each hypothesis and backs up predictions with 4+ resources Student documented results in a good clear format and took time to really think about the results Student documented little information about their results in a disorganized manner and did not take time to think about the results at all Student documented their results in a somewhat organized way and took some time to think about the results before writing Student documented their results in an organized format and thought about their results before writing Student documented their results in a very clear, organized manner and thoroughly thought about every result before writing out a response Student followed instructions to ensure that their work was successful and got good results Student followed few instructions and therefore did not get good results Student followed  some instructions and got mediocre results Student followed instructions well and got good results Student thoroughly followed instructions and got great results Student shows a good understanding of solubility and saturation in their final product Student doesn’t seem to understand much about the topics Student shows a basic understanding of the topics Student appears to have a good understanding of the topics Student clearly understands the topic exceptionally well

 Level 1 Level 2 Level 3 Level 4 Matter identification Identifies none or one of the three basic matter states; gives no examples Identifies two of the three basic matter states; gives one or two examples each Identifies all three of the basic matter states; gives three examples each Identifies all three of the basic matter states; gives four or more examples for each Particle theory rules Creates two or less important rules of particle theory Creates three or four important rules of particle theory Creates five important rules of particle theory Creates six or more important rules of particle theory Matter changing state Identifies none or one process for matter to change state; gives none or one example for each Identifies two or three processes for matter to change state; gives two examples for each Identifies four processes for matter to change state; gives three examples for each Identifies five or more processes for matter to change state Other matter states Identifies none of the other matter states; gives no examples Identifies one of the other matter states; gives an example Identifies both of the other matter states; gives an example for each Identifies both of the other matter states; gives 2 or more examples for each Pure substances VS mixtures Doesn’t communicate the difference between a pure substance and a mixture Somewhat communicates the difference between a pure substance and a mixture Effectively communicates the difference between a pure substance and a mixture Clearly communicates the difference between a pure substance and a mixture Classification of mixtures Identifies neither of the classifications Identifies one of the classifications Identifies both classifications Identifies both classifications and explains what they mean Comparing different kinds of mixtures Doesn’t compare the two kinds Somewhat compares the two kinds Effectively compares the two kinds Clearly compares the two kinds Household examples Finds none or one household example of each kind of substance Finds two household example of each kind of substance Finds three household example of each kind of substance Finds four or more household example of each kind of substance

Bonus: Was the person who proposed the idea of particle theory found?       Yes            No

Conclusion

So, now you know all about pure substances in mixtures! In this WebQuest, you learned about solutions, solubility, saturation, the particle theory, and how to separate mixtures and solutions! You have done so much work and now you know so much more!

Now that you're done, you'll notice all of this in the real world! Now you're an expert on pure substances and mixtures!