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

Was the hypothesis, repeated above, completely supported? Justify your answers.

Answer:

Corn starch, one of the covalent compounds, is solid at room temperature. The property of being solid is more common to ionic compounds. So, the hypothesis was mostly supported except for this one data point.

4

Select all facts that you mentioned.

A
Cornstarch is solid at room temperature.
B
The property of being solid is more common to ionic compounds.
C
The hypothesis was mostly supported except for this one data point.
7

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.
9

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Answer not available
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.
13

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.
26

If a substance is ionic, then it likely will

Answer:

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

27

Select all properties you listed for ionic.

A
be a crystalline solid
B
be soluble in water
C
conduct electricity
28

If a substance is covalent, then it likely will

Answer:

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

29

Select all properties you listed for covalent.

A
be a liquid or gas
B
not be soluble in water
C
not conduct electricity
42

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