Mixtures and Solutions Lab Prep

​Mixtures and Solutions Lab Prep

​Topic 4 Lab

​Background Information

Multiple Choice

A _________ is made from a combination of two or more kinds of matter (substances) that are physically mixed together.

• Atoms

• Solvent

• Mixture

• Precipitate

Multiple Choice

True or False: The mixing of two or more substances creates a new substance that is different from the ones mixed.

• True

• False

Multiple Choice

Substances that dissolve in another substance form a special kind of mixture called a _______.

• Mixture

• Solution

• Solvent

• none of the above

​Procedures Steps 1-3

Dropdown

First, I need to ​

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​ I will use a ​

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to identify the salt, sand, and iron fillings.

Second, I will take the ​​

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in a sealed plastic bag and move it around under the index card. I will slowly ​

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and take it away from the index card several times until I have separated one ingredient from the mixture. The student doing this should be wearing ​

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. Carefully brush only the separated particles onto a clean index card.

​Procedures Steps 4-6

Dropdown

Use a ​

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to observe the particles that were ​

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out of the solid mixture. ​

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in data table #4. Put the remaining mixture (not the iron fillings) back into the plastic cup. Pour ​

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of water into the cup with the mixture. Stir it for ​

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with a plastic spoon. Put the cone-shaped coffee filter in the other plastic cup.

​Procedures Steps 7-10

Dropdown

Pour the mixture in the cup through the coffee filter in the other cup. Use the ​

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to scrape out all of the mixture from the cup.

Carefully remove the ​

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from the cup. Open up the filter. Use the ​

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to observe what is in the coffee filter. Record your observations in the data table #8.

Use the hand lens to observe what is in the ​

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. Record your observations in the data table #9. 

Leave the cup in a sunny window to allow the water to ​

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. After several days, use the hand lens to observe what is in the cup now. Record your observations in data table #10.