The Science of Water: Properties, Behavior, and Chemical Reactions

The video explores water's properties, including its composition, physical states, and high boiling point due to hydrogen bonding. It discusses water's role as a universal solvent and why non-polar compounds like lipids don't dissolve in it. Water's ability to act as both an acid and a base is highlighted, along with its potential as a hydrogen fuel source for the future.

What percentage of the Earth's surface is covered by water?

• 50%

• 60%

• 70%

• 80%

Which of the following is a property of pure water?

• It is colored

• It has a strong smell

• It is tasteless

• It is solid at room temperature

Why does water have a higher boiling point compared to methanol?

• Because it is a non-polar molecule

• Due to its hydrogen bonding

• Because it is a solid at room temperature

• Due to its ionic nature

Which of the following is NOT a compound that dissolves in water?

• Hydrochloric acid

• Sodium chloride

• Lipids

• Sodium hydroxide

What term describes substances that do not mix with water?

• Hydrophobic

• Hydrophilic

• Polar

• Ionic

How can water act in chemical reactions?

• As neither an acid nor a base

• As both an acid and a base

• Only as a base

• Only as an acid

What ion is formed when water donates a proton?

• Sodium ion

• Hydroxide ion

• Chloride ion

• Hydronium ion

What is the charge of a hydronium ion?

• +1

• -1

• +2

• 0

What is a major challenge in using hydrogen as a fuel source?

• Lack of hydrogen availability

• High cost of hydrogen

• Problems with storage and transportation

• Hydrogen's inability to produce energy

What is the potential future source of hydrogen for fuel?

• Natural gas

• Methane

• Water

• Coal