AnswersAL-Physical Science A- TAPLab: Ionic and Covalent Bonds

Lab: Ionic and Covalent Bonds Answers

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1
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How does a conductivity apparatus test whether a solution has ionic or covalent substances in it?

A
It fails to light up except in homogeneous solutions.
B
It lights up when the leads touch each other.
C
Ions complete the flow of electrons to form a circuit.
D
The covalent substances bond to the leads to prevent the lightbulb from lighting.
2
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What properties would you expect for CaO? Select all that apply.

A
It is likely a gas or liquid at room temperature.
B
It is likely soluble in water.
C
It will likely light up a bulb in a conductivity apparatus.
D
It will likely have a high melting point.
3

Which of the following tools could have become cross-contaminated during the experiment if you had not cleaned them carefully between successive tests?

A
Spoon
B
Beaker
C
Stirring Rod
D
Graduated Cylinder
E
Distilled water in spray bottle
4

Identify all actions that you should take if you have chipped or broken glassware.

A
Notify your teacher.
B
Have the custodian clean it up after school.
C
Sweep it into a corner.
D
Notify classmates.
E
Dispose of it in the designated glass waste area.
5

Carbon tetrachloride (CCl4) is ionic.✔ covalent.

A
ionic.
B
✔ covalent.
6

What properties would you expect for CCl4? Select all that apply.

A
It is likely a gas or liquid at room temperature.
B
It is likely soluble in water.
C
It will likely light up a bulb in a conductivity apparatus.
D
It will likely have a high melting point.
7

Calcium oxide (CaO) is ✔ ionic.covalent.

A
✔ ionic.
B
covalent.
8

The concentration of ionic substances is important for the heart to beat. Your heart responds to electrical impulses that travel through heart cells that are made up mostly of water. Which properties of ionic compounds are important to support this function?

A
Solubility in water
B
Conductivity
C
Crystalline
D
Melting point

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