pH in Our Lives
(This was my activity that I made based on the PHET simulations)
Many foods and items in our lives are acids and bases. We will be exploring Phet simulations to see these objects and how we can change them on the pH scale.
(This lesson is made for third through fifth grade)
SCI.CC2.3-5 Students routinely identify and test causal relationships and use these relationships to explain change. They understand events that occur together with regularity may or may not signify a cause and effect relationship.
SCI.CC6.3-5 Students understand different materials have different substructures, which can sometimes be observed; and substructures have shapes and parts that serve functions.
SCI.SEP1.A.3-5 Students ask questions that specify qualitative relationships. This includes the following: Ask questions about what would happen if a variable is changed. Identify scientific (testable) and non-scientific (non-testable) questions. Ask questions that can be investigated and predict reasonable outcomes based on patterns such as cause and effect relationships.
1. Draw the pH scale and label it with where acids bases and neutrals are. (we will use this chart during our simulation). Color in the scale using the simulation scale colors.
2. Use the pH Scale Basics simulator and fill the container with each of the liquids and measure their pH. Record the information on the scale and in the charts below. One chart is for acids and one is for bases.
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Substance
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pH
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Acid or base
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Substance
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pH
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Acid or base
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3. Order the substances on the chart according to the scale most acidic to least acidic.
4. From what you have seen on the chart what makes something an acid and what makes something a neutral?
5. How can you change the pH of a substance?
6. What does it mean to dilute something? What substance can be used to dilute substances?
7. Using the chart below write the pH of 6 substances and one mystery substance. Then find the amount of water it takes to dilute the substance until the container is full. Put .06 liters of each substance in for an accurate reading
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substance
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pH
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pH after dilution
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soda
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2.50
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Hand soap
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10
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Chicken soup
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5.80
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blood
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7.40
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Drain cleaner
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13.0
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Orange juice
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3.50
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Mystery object
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7.40
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8. What was the mystery object?
9. What do the acids and bases have in common?
10. Combine two substances together and record their pH. It will work better if you combine an acid and base. What was the result?
11. As stated at the start of the lesson these objects are found all around the home? Look up more acids and bases that can be found in your home.
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