Water & pH

A single water molecule is held together by:

• an H-bond.

• an ionic bond.

• a covalent bond.

Multiple water molecules are held together by:

• covalent bonds.

• ionic bonds.

• hydrogen bonds.

When water sticks to other polar substances, it is known as

• adhesion

• cohesion

• transpiration

• surface tension

When water is attracted to other water molecules, it is known as

• capillary action

• surface tension

• adhesion

• cohesion

Tags

NGSS.HS-ESS2-5

When water molecules at the surface of a liquid pull together to form a tight film of liquid, it is known as:

• cohesion

• adhesion

• surface tension

• polarity

Why is water a polar molecule?

• The oxygen and hydrogen molecules share electrons equally.

• The oxygen and hydrogen molecules do NOT share electrons equally.

• The oxygen atom transfers electrons to the hydrogens.

• The hydrogen atoms transfer electrons to the oxygen atom.

Due to water's polarity, the oxygen atom in the water molecule is slightly

• positive

• negative

Tags

NGSS.HS-ESS2-5

Water has the ability to dissolve many polar substances. Which property of water is being described?

• Water is less dense as a solid.

• Water is the universal solvent.

• Water has a high specific heat.

• Water has surface tension.

Tags

NGSS.HS-ESS2-5

A neutral has a pH of:

• 0

• 5

• 7

• 14

What is the pH range of an acid?

• 0-6.9

• 0-5

• 7.1-14

• 5-10