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Combining and Separating
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Video LessonsCombining Particles
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Separating Particles
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Experiments and ActivitiesSeparate Sand, Salt, and Iron
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What is Magnetic?
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Filtering a Suspension
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How Does Soap Work?
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Reaction 1: Fizz
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Reaction 2: Precipitates
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Hydrophobic Hot Cocoa
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AnswersAnswer Key: Combining and Separating
Section 8 of 10
In Progress
Reaction 2: Precipitates
Approximate time to complete: 25-35 minutes + waiting time + questions and journal time
Experiment Card
Click below to download and print this experiment card:
Safety Considerations
This experiment should be performed by an adult. This experiment involves very hot objects.
Purpose
How do they get solid cheese from liquid milk? If you freeze milk, it turns into ice cream (well … kind of). I wonder what will happen if I try mixing milk with something else.
Materials
- 1 Beaker
- 20mL Vinegar
- Cheese Cloth
- Rubberband
- 2 Containers That Can Hold Hot Liquid
- Measuring Cup
- 1 Cup Dairy Milk
- Microwave, Hot Plate, or Stove + Small Pot
- Colored Markers (Optional)
Procedure
- Take one heatproof container, and secure the cheesecloth over the top with a rubber band.
- Measure 1 cup of milk, and pour it into your other heatproof container or pot.
- Using your beaker, measure 20mL of vinegar, and add it into the milk. Observe what happens.
- Begin heating the mixture of milk and vinegar.
- Option 1: Heat 1 minute in the microwave.
- Option 2: Heat over a hot plate or stove until you see small solid pieces appear.
- CAREFUL your mixture will be HOT!
- Pour the heated mixture through the cheesecloth and into the other container.
- Allow it to cool, then remove the substance from the cheesecloth, and place it on a flat surface to dry overnight.
- You may need to flip it in the morning and let it keep drying.
- Use your markers to decorate your final product!
Questions & Further Research
- What happened when you added vinegar to milk? Did heating the mixture make the change more or less noticeable?
- What is a precipitate? (Hint: your final product in this experiment is a precipitate).
- Would this experiment change if you used whole milk v. low-fat milk v. non-fat milk?
- Would it work with non-dairy milk such as almond milk or oat milk?