AnswersChemistry 1A - Mr. KaanLab: Ionic and Covalent Bonds

Lab: Ionic and Covalent Bonds Answers

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1
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Which substances were ionic?

A
Oil
B
cornstarch
C
sodium chloride
D
sodium bicarbonate
2
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How good were your predictions in the warm-up?

A
0 out of 4 right
B
1 out of 4 right
C
2 out of 4 right
D
3 out of 4 right
E
4 out of 4 right
3

Calcium oxide (CaO) is

A
ionic.
B
covalent.
4

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.
5

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.
6

Question text not available

Answer not available
7

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.
8

Carbon tetrachloride (CCl4) is

A
ionic.
B
covalent.
9

If a substance is ionic, then it likely will

Answer:

be a crystalline solid, be soluble in water, and conduct electricity

10

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
11

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.
12

Select all properties you listed for ionic.

A
be a crystalline solid
B
be soluble in water
C
conduct electricity
13

If a substance is covalent, then it likely will

Answer:

be a liquid or gas, not be soluble in water, and not conduct electricity

14

Select all properties you listed for covalent.

A
be a liquid or gas
B
not be soluble in water
C
not conduct electricity

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