Deanne and Bo conduct an experiment at school. They put vinegar into a dish, and then they add baking soda to it. Lots of bubbles form as they stir the two substances together. After the bubbling stops, they notice that they no longer smell the distinctive odor of vinegar. Their teacher explains that the atoms making the vinegar and the atoms making the baking soda were recombined to form water, carbon dioxide, and another compound called sodium acetate.(2 points)
a. Deanne and Bo determine that a reaction
take place. When a reaction takes place, atoms must
undergo a rearrangement in order to form new substances.
Deanne and Bo conduct an experiment at school. They put vinegar into a dish, and then they add baking soda to it. Lots of bubbles form as they stir the two substances together. After the bubbling stops, they notice that they no longer smell the distinctive odor of vinegar. Their teacher explains that the atoms making the vinegar and the atoms making the baking soda were recombined to form water, carbon dioxide, and another compound called sodium acetate.
. Deanne and Bo determine that a reaction _______ take place. When a reaction takes place, atoms must _____________________
Deanne and Bo determine that a reaction did take place. When a reaction takes place, atoms must undergo a rearrangement in order to form new substances.
. Which of the following pieces of evidence helped Deanne and Bo answer question a?(2 points)
evidence that was useful to Deanne and Bo evidence that was not observed or was not useful
A solid dissolved in a liquid.
evidence that was useful to Deanne and Bo – A solid dissolved in a liquid.
evidence that was not observed or was not useful – A solid dissolved in a liquid.
A new gas was formed.
evidence that was useful to Deanne and Bo – A new gas was formed.
evidence that was not observed or was not useful – A new gas was formed.
An odor changed.
evidence that was useful to Deanne and Bo – An odor changed.
evidence that was not observed or was not useful – An odor changed.
They saw a new color.
evidence that was useful to Deanne and Bo – They saw a new color.
evidence that was not observed or was not useful – They saw a new color.
Deanne and Bo conduct an experiment at school. They put vinegar into a dish, and then they add baking soda to it. Lots of bubbles form as they stir the two substances together. After the bubbling stops, they notice that they no longer smell the distinctive odor of vinegar. Their teacher explains that the atoms making the vinegar and the atoms making the baking soda were recombined to form water, carbon dioxide, and another compound called sodium acetate.(2 points)
a. Deanne and Bo determine that a reaction
did
take place. When a reaction takes place, atoms must
rearrange to form new substance
.
Question 2
b. Which of the following pieces of evidence helped Deanne and Bo answer question a?(2 points)
evidence that was useful to Deanne and Bo evidence that was not observed or was not useful
A solid dissolved in a liquid.
evidence that was useful to Deanne and Bo – A solid dissolved in a liquid.
evidence that was not observed or was not useful – A solid dissolved in a liquid.
A new gas was formed.
evidence that was useful to Deanne and Bo – A new gas was formed.
evidence that was not observed or was not useful – A new gas was formed.
An odor changed.
evidence that was useful to Deanne and Bo – An odor changed.
evidence that was not observed or was not useful – An odor changed.
They saw a new color.
evidence that was useful to Deanne and Bo – They saw a new color.
evidence that was not observed or was not useful – They saw a new color.
Based on the given information, the following evidence helped Deanne and Bo determine that a reaction took place:
- A new gas was formed.
- An odor changed.
The evidence that was not observed or was not useful is:
- A solid dissolved in a liquid.
- They saw a new color.
a. The boiling point of water is 100o
C. The boiling point of hydrogen peroxide is about 150o
C. Does this make sense? Why or why not.
(1 point)
Responses
No, it doesn't make sense, because a physical change took place.
No, it doesn't make sense, because a physical change took place.
Yes, it makes sense, because we expect products and reactants to have different properties.
Yes, it makes sense, because we expect products and reactants to have different properties.
Yes, it makes sense, because a physical change took place.
Yes, it makes sense, because a physical change took place.
No, it doesn't make sense, because we expect products and reactants to have different properties.
No, it doesn't make sense, because we expect products and reactants to have different properties.
Question 2
b. How would you expect the density of water to compare to the density of hydrogen peroxide?(1 point)
Responses
The density of water would be the same as the density of hydrogen peroxide.
The density of water would be different from the density of hydrogen peroxide.
It is impossible to tell if the densities would be the same or different.
b. How would you expect the density of water to compare to the density of hydrogen peroxide?
The density of water would be the same as the density of hydrogen peroxide.
a. The boiling point of water is 100o
C. The boiling point of hydrogen peroxide is about 150o
C. Does this make sense? Why or why not.
(1 point)
Responses
No, it doesn't make sense, because a physical change took place.
No, it doesn't make sense, because a physical change took place.
Yes, it makes sense, because we expect products and reactants to have different properties.
Yes, it makes sense, because we expect products and reactants to have different properties.
Yes, it makes sense, because a physical change took place.
Yes, it makes sense, because a physical change took place.
No, it doesn't make sense, because we expect products and reactants to have different properties.
No, it doesn't make sense, because we expect products and reactants to have different properties.
Question 2