Exploring Water's Role in Life and pH Balance

Who is often referred to as the father of modern chemistry?

• Henry Cavendish

• Antoine-Laurent Lavoisier

• Isaac Newton

• Robert Boyle

What did Lavoisier name the gas that he discovered?

• Hydrogen

• Nitrogen

• Oxygen

• Carbon Dioxide

What are the chemical components of water?

• CO2

• O2

• H2

• H2O

What type of bond forms between hydrogen and oxygen in a water molecule?

• Hydrogen bond

• Ionic bond

• Covalent bond

• Metallic bond

Why does water have a bent, V shape?

• Due to the metallic bonds

• Because of the ionic bonds

• Due to the attraction between hydrogen atoms

• Because of the repulsion between negatively charged electrons

What property of water allows it to dissolve ionic salts?

• Nonpolarity

• High density

• Polarity

• Low surface tension

Why does ice float on water?

• Because ice is denser than water

• Because ice forms fewer hydrogen bonds

• Because ice forms more hydrogen bonds and spaces out more

• Because ice is nonpolar

What allows water striders to walk on water?

• Adhesion

• Cohesion and surface tension

• Evaporation

• Density

What is the pH value of neutral water?

• 0

• 7

• 14

• 5

What happens to water molecules when they split apart?

• They form oxygen and hydrogen gas

• They form two hydroxide ions

• They form a hydrogen ion and a hydroxide ion

• They form two hydrogen ions