Warm Up

Mayor McKnight has written to us with a new idea for how to help the people of East Ferris. Read and answer the questions below.

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Based on the definition, which of the following could be described as wastewater? Select all that apply (there may be more than one correct answer).

A) Water from a factory that now contains toxic metals.

B) Water that you just used to wash your floors or your car.

C) Water you’re about to drink that came from your faucet.

D) Water that goes down the toilet after you flush.

Let’s look at the diagram of how a wastewater treatment plant works.

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What happens at Step 1?

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What happens at Step 2?

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What happens at Step 3?

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What happens at Step 4?

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Does the wastewater have the same properties before and after being treated (after substances were added)?

A) Yes, the wastewater has the same properties before and after being treated

B) No, the wastewater has different properties before and after being treated

Observing Substances

To help us figure out how new substances form, let’s do an investigation. We will observe substances before and then mix them together to see what happens.

Directions:

Part 1: Before Mixing:

Observe the baking soda, calcium chloride, and phenol red solution BEFORE mixing using the pictures below. [color, shape, size, smell, state of matter (solid, liquid, gas)] Write your observations in the table below.

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What are 2 properties of baking soda [color, shape, size, smell, phase of matter (solid, liquid, gas)]?

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What are 2 properties of calcium chloride [color, shape, size, smell, phase of matter (solid, liquid, gas)]?

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What are 2 properties of phenol red solution [color, shape, size, smell, phase of matter (solid, liquid, gas)]?

Part 2: During and After Mixing:

Now, watch the video where our three substances are mixed together! Record your observations in the table above.

I'll put the video later, watch me and follow the directions.

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What happened while the baking soda, calcium chloride, and phenol red solution were mixing?

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What properties did you observe after the substances mixed?

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Are they the properties the same or different as the properties before they mixed?

A) The properties the before and after they mixed are the same.

B) The properties the before and after they mixed are the different.

Key Concept:

When you mix substances, you sometimes end up with a mixture that has different properties.

You should have have read the book Chemical Reactions Everywhere for last week's TES 5.2 assignment. Let's review chemical reactions.

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Which of these pieces of evidence (that a chemical reaction happened) did we see in our investigation?

Based on this, we can say a chemical reaction did occur during the Mixing Substances Investigation. Because a reaction occurred, we will call it the Hot Yellow Gas Reaction. We know it is a reaction because there was a color change, a temperature change, and gas was produced. We can call it the HYG Reaction for short.

Did a Chemical Reaction Happen?

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Banana Aging: Which pieces of evidence shows there was a chemical reaction for the picture above?

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Banana Aging: Is this is a chemical reaction? Did a new substance (made of one type of atom or molecule) form?

A) Yes, this is a chemical reaction.

B) No, this is not a chemical reaction.

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Ice Melting: Which pieces of evidence shows there was a chemical reaction for the picture above?

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Ice Melting: Is this is a chemical reaction? Did a new substance (made of one type of atom or molecule) form?

A) Yes, this is a chemical reaction.

B) No, this is not a chemical reaction.

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Marshmallows Roasting: Which pieces of evidence shows there was a chemical reaction for the picture above?

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Marshmallows Roasting: Is this is a chemical reaction? Did a new substance (made of one type of atom or molecule) form?

A) Yes, this is a chemical reaction.

B) No, this is not a chemical reaction.

TES 5.1-5.2

Key Concept:

Did a Chemical Reaction Happen?

TES 5.1-5.2

Based on the definition, which of the following could be described as wastewater? Select all that apply (there may be more than one correct answer).

What happens at Step 1?

What happens at Step 2?

What happens at Step 3?

What happens at Step 4?

Does the wastewater have the same properties before and after being treated (after substances were added)?

Observing Substances

What are 2 properties of baking soda [color, shape, size, smell, phase of matter (solid, liquid, gas)]?

What are 2 properties of calcium chloride [color, shape, size, smell, phase of matter (solid, liquid, gas)]?

What are 2 properties of phenol red solution [color, shape, size, smell, phase of matter (solid, liquid, gas)]?

What happened while the baking soda, calcium chloride, and phenol red solution were mixing?

What properties did you observe after the substances mixed?

Are they the properties the same or different as the properties before they mixed?

Key Concept:

Which of these pieces of evidence (that a chemical reaction happened) did we see in our investigation?

Did a Chemical Reaction Happen?

Banana Aging: Which pieces of evidence shows there was a chemical reaction for the picture above?

Banana Aging: Is this is a chemical reaction? Did a new substance (made of one type of atom or molecule) form?

Ice Melting: Which pieces of evidence shows there was a chemical reaction for the picture above?

Ice Melting: Is this is a chemical reaction? Did a new substance (made of one type of atom or molecule) form?

Marshmallows Roasting: Which pieces of evidence shows there was a chemical reaction for the picture above?

Marshmallows Roasting: Is this is a chemical reaction? Did a new substance (made of one type of atom or molecule) form?

Based on the definition, which of the following could be described as wastewater? Select all that apply (there may be more than one correct answer).

What happens at Step 1?

What happens at Step 2?

What happens at Step 3?

What happens at Step 4?

Does the wastewater have the same properties before and after being treated (after substances were added)?

Observing Substances

What are 2 properties of baking soda [color, shape, size, smell, phase of matter (solid, liquid, gas)]?

What are 2 properties of calcium chloride [color, shape, size, smell, phase of matter (solid, liquid, gas)]?

What are 2 properties of phenol red solution [color, shape, size, smell, phase of matter (solid, liquid, gas)]?

What happened while the baking soda, calcium chloride, and phenol red solution were mixing?

What properties did you observe after the substances mixed?

Are they the properties the same or different as the properties before they mixed?

Which of these pieces of evidence (that a chemical reaction happened) did we see in our investigation?

Banana Aging: Which pieces of evidence shows there was a chemical reaction for the picture above?

Banana Aging: Is this is a chemical reaction? Did a new substance (made of one type of atom or molecule) form?

Ice Melting: Which pieces of evidence shows there was a chemical reaction for the picture above?

Ice Melting: Is this is a chemical reaction? Did a new substance (made of one type of atom or molecule) form?

Marshmallows Roasting: Which pieces of evidence shows there was a chemical reaction for the picture above?

Marshmallows Roasting: Is this is a chemical reaction? Did a new substance (made of one type of atom or molecule) form?