Hydrogen Bonding Worksheet

Question 1

Which attraction between two water molecules represents a hydrogen bond?

1. Between the O atom and an H atom within one molecule
2. Between an O atom of one molecule and an H atom bonded to O in another molecule
3. Between two H atoms in one molecule
4. Between two protons in an O nucleus

Question 2

Explain why methane, CH₄, lacks the donor needed to form hydrogen bonds with other methane molecules.

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Question 3

As water boils, which attractions are overcome to separate the molecules?

1. The covalent O–H bonds within each molecule
2. The forces holding each oxygen nucleus together
3. Attractions between different water molecules
4. The bonds between hydrogen atoms within each molecule

Question 4

Dimethyl ether has the structure CH₃–O–CH₃. Explain how its oxygen can accept a hydrogen bond from a water molecule.

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Question 5

Which substance can form hydrogen bonds between its own molecules?

1. Ethanol only
2. Dimethyl ether only
3. Both substances
4. Neither substance

Question 6

Use the structures and boiling points to support the claim that ethanol molecules experience stronger intermolecular attractions than dimethyl ether molecules.

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Question 7

How many degrees Celsius higher is ethanol’s normal boiling point in the table? Show your calculation.

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Question 8

Which feature is the same for both substances because they share a molecular formula?

1. Boiling point
2. Ability to donate a hydrogen bond
3. Molar mass
4. Order in which the atoms are joined