Question 5

Question

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Part A: "Water" Tab Make sure you are reviewing Unit 4 Lessons 4-6 to help with portfolio concepts.
"Water" 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

A. Click on the “Water” tab and click “water partial charges”. You’ll see the greek letter delta (δ) which represents partial along with a charge sign.



A)The partial charge of the oxygen is negative and the partial charge of the hydrogen is positive.(1 point)
Responses

True
True

False
False
Part B: "Water" Tab
B. Add salt to the water, wait a few seconds, click pause.
B)When the NaCl (salt) is added to the water the NaCl ....(click all that apply)(2 points)
Responses

separates into ions
separates into ions

most likely will conduct electricity
most likely will conduct electricity

does not separate into ions
does not separate into ions

displays covalent molecule proeperties
displays covalent molecule proeperties
Part C: "Water" Tab
C. Click the "reset" button. Add sugar to the water, wait a few seconds, click pause.
C)When the sugar is added to the water, the sugar molecule(1 point)
Responses

separates into ions
separates into ions

Does not separate into ions
Does not separate into ions

Has an attraction to the water molecules
Has an attraction to the water molecules
D)Which one of the two tested substances (NaCl or C12H22O11) is the ionic substance?(1 point)
Responses

Both
Both

Sugar
Sugar

Salt
Salt
E)Why is sugar not considered an ionic substance? (click all that apply)(1 point)
Responses

Because it does not contain charged particles and is made up of non metals
Because it does not contain charged particles and is made up of non metals

Because it separates into its separate ions
Because it separates into its separate ions

Because it contains charged particles

Answer 1

Here are the answers based on the concepts related to water, ionic substances, and sugar:

Part A: "Water" Tab

A) The partial charge of the oxygen is negative and the partial charge of the hydrogen is positive.
Response: True

Part B: "Water" Tab

B) When the NaCl (salt) is added to the water, the NaCl...(click all that apply)
Responses:

• separates into ions
• most likely will conduct electricity

Part C: "Water" Tab

C) When the sugar is added to the water, the sugar molecule...
Response:

• Does not separate into ions
• Has an attraction to the water molecules

Part D

D) Which one of the two tested substances (NaCl or C12H22O11) is the ionic substance?
Response:

• Salt

Part E

E) Why is sugar not considered an ionic substance? (click all that apply)
Responses:

• Because it does not contain charged particles and is made up of non-metals

Please review these responses and verify against the concepts you have learned in your lessons.