Question
Video Player
00:0005:39
Part A: "Macro" Tab - Make sure you are reviewing Unit 4 Lessons 4-6 in order to help you with the portfolio concepts.
"Macro" Tab Part A - Watch the video with the pHET demonstration or go to the pHET Virtual Lab and complete the steps on your own. Answer the following questions
Click on “show values” in the concentration section. Drag the conductivity meter and place the positive (+) and negative (-) ends in the water. Answer the questions below.
Question 1
The conductivity meter conducts electricity when placed in water.(1 point)
Responses
True
True
False
False
Part B: "Macro" Tab
Use the “solute” section to add salt to the water. “Shake” the container of salt to add. Observe what happens to the conductivity meter. Answer the questions below.
Question 2
There is evidence that NaCl is an ionic substance(1 point)
Responses
True
True
False
False
Question 3
Adding more NaCl to the solution increases the number of ions in solution.(1 point)
Responses
True
True
False
False
Part C: "Macro" Tab
Click “Reset All” in the bottom right corner, drag the conductivity meter into the solution again. Select “Sugar” as your solute and add the container of sugar to the solution. Answers the questions below.
Question 4
What is the visible evidence that sugar is not an ionic substance?(1 point)
Responses
The sugar molecules separate into ions
The sugar molecules separate into ions
The conductivity meter lights up
The conductivity meter lights up
The conductivity meter does not light up
The conductivity meter does not light up
The sugar molecules separate in solution
The sugar molecules separate in solution
Question 5
The properties of sugar in this experiment demonstrate it its most likely a/an (Click all that apply)(1 point)
Responses
substance that breaks apart into ions
substance that breaks apart into ions
substance that does not conduct electricity
substance that does not conduct electricity
Covalent substance
Covalent substance
Ionic substance
Ionic substance
Question 6
The properties of salt in this experiment demonstrate it its most likely a/an (click all that apply)(1 point)
Responses
Ionic substance
Ionic substance
Covalent substance
Covalent substance
substance that breaks apart into ions
substance that breaks apart into ions
substance that does not conduct electricity
substance that does not conduct electricity
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00:0005:39
Part A: "Macro" Tab - Make sure you are reviewing Unit 4 Lessons 4-6 in order to help you with the portfolio concepts.
"Macro" Tab Part A - Watch the video with the pHET demonstration or go to the pHET Virtual Lab and complete the steps on your own. Answer the following questions
Click on “show values” in the concentration section. Drag the conductivity meter and place the positive (+) and negative (-) ends in the water. Answer the questions below.
Question 1
The conductivity meter conducts electricity when placed in water.(1 point)
Responses
True
True
False
False
Part B: "Macro" Tab
Use the “solute” section to add salt to the water. “Shake” the container of salt to add. Observe what happens to the conductivity meter. Answer the questions below.
Question 2
There is evidence that NaCl is an ionic substance(1 point)
Responses
True
True
False
False
Question 3
Adding more NaCl to the solution increases the number of ions in solution.(1 point)
Responses
True
True
False
False
Part C: "Macro" Tab
Click “Reset All” in the bottom right corner, drag the conductivity meter into the solution again. Select “Sugar” as your solute and add the container of sugar to the solution. Answers the questions below.
Question 4
What is the visible evidence that sugar is not an ionic substance?(1 point)
Responses
The sugar molecules separate into ions
The sugar molecules separate into ions
The conductivity meter lights up
The conductivity meter lights up
The conductivity meter does not light up
The conductivity meter does not light up
The sugar molecules separate in solution
The sugar molecules separate in solution
Question 5
The properties of sugar in this experiment demonstrate it its most likely a/an (Click all that apply)(1 point)
Responses
substance that breaks apart into ions
substance that breaks apart into ions
substance that does not conduct electricity
substance that does not conduct electricity
Covalent substance
Covalent substance
Ionic substance
Ionic substance
Question 6
The properties of salt in this experiment demonstrate it its most likely a/an (click all that apply)(1 point)
Responses
Ionic substance
Ionic substance
Covalent substance
Covalent substance
substance that breaks apart into ions
substance that breaks apart into ions
substance that does not conduct electricity
substance that does not conduct electricity
Skip to navigation
Answers
GPT-5 mini
Here are the answers (with brief reasons):
Part A
1. False — pure/distilled water does not conduct well; the meter only shows conductivity when ions are present.
Part B
2. True — adding NaCl makes the meter conduct, indicating ionic behavior.
3. True — more NaCl → more dissolved ions → higher conductivity.
Part C
4. The conductivity meter does not light up — sugar does not produce ions in solution, so it does not conduct.
5. Select:
- substance that does not conduct electricity
- Covalent substance
6. Select:
- Ionic substance
- substance that breaks apart into ions
Part A
1. False — pure/distilled water does not conduct well; the meter only shows conductivity when ions are present.
Part B
2. True — adding NaCl makes the meter conduct, indicating ionic behavior.
3. True — more NaCl → more dissolved ions → higher conductivity.
Part C
4. The conductivity meter does not light up — sugar does not produce ions in solution, so it does not conduct.
5. Select:
- substance that does not conduct electricity
- Covalent substance
6. Select:
- Ionic substance
- substance that breaks apart into ions