Topic 2.2 Water

Question 1

What type of bonds are shared between hydrogen and oxygen to form water?

Answer 1

Covalent bonds (they share electrons)

Question 2

Why are covalent bonds important in water?

Answer 2

Hydrogen and oxygen do not share electrons equally which makes water a polar molecule

Question 3

What is the consequence of this sharing of electrons?

Answer 3

Part of the molecule has a slight positive charge and another part has a slightly negative charge making it polar.

Question 4

How does the polarity of water allow it to form bonds with other polar substances?

Answer 4

Negatively and positively charged molecules are attracted to each other making hydrogen bonds between two polar molecules


Question 5

What is the name of the property that causes hydrogen bonds to form with itself?

Answer 5

Cohesion (because of its polarity)

Question 6

What is the name of the property that causes hydrogen bonds to form with others?

Answer 6

Adhesion (because of its polarity)

Question 7

What’s the difference between cohesion and adhesion?

Answer 7

Cohesion: the forming of hydrogen bonds within other water molecules
Adhesion: the formation of hydrogen bonds with other polar molecules