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 in solution The sugar molecules separate in solution The conductivity meter does not light up The conductivity meter does not light up The sugar molecules separate into ions The sugar molecules separate into ions The conductivity meter lights up The conductivity meter lights up Question 5 The properties of sugar in this experiment demonstrate it its most likely a/an(1 point) Responses substance that breaks apart into ions substance that breaks apart into ions Covalent substance Covalent substance Ionic substance Ionic substance substance that does not conduct electricity substance that does not conduct electricity Question 6 The properties of salt in this experiment demonstrate it its most likely a/an(1 point) Responses Covalent substance Covalent substance Ionic substance Ionic substance ​​​​​​ substance that does not conduct electricity ​​​​​​ substance that does not conduct electricity substance that breaks apart into ions

Answer 1

Based on the questions and the information provided about the pHET demonstration, here are the answers to each of the questions:

Part A

Question 1: The conductivity meter conducts electricity when placed in water.
Response: True

Part B

Question 2: There is evidence that NaCl is an ionic substance.
Response: True

Question 3: Adding more NaCl to the solution increases the number of ions in solution.
Response: True

Part C

Question 4: What is the visible evidence that sugar is not an ionic substance?
Response: The conductivity meter does not light up

Question 5: The properties of sugar in this experiment demonstrate it is most likely a/an
Response: Covalent substance

Question 6: The properties of salt in this experiment demonstrate it is most likely a/an
Response: Ionic substance

These answers are based on the typical behavior of ionic and covalent substances in terms of conductivity and the interaction with water.