Role of Water and Chemistry

The chemical compound of water is

• HO
• H₂O
• H₃O
• HO₂

Tags

NGSS.MS-PS1-1

Water is a universal solvent

• True
• False

Pure water has a

• Neutral pH 
• Negative pH
• Positive pH
• Both Negative and Positive pH

A Compound that is being dissolved is called a

• Solution
• Solute
• Solvent
• Suspension

Tags

NGSS.MS-PS1-2

A solvent is...

• substance into which the solute dissolves
• a compound being dissolved
• a substance that does not dissolve
• None of the above

What is water made of?

• Water
• Liquid
• Hydrogen and oxygen
• Blue 

Tags

NGSS.MS-PS1-1

What is an example of something that dissolves in water

• Yourself
• Sugar
• A rock
• A boat

Tags

NGSS.MS-PS1-2

A water strider can skate along the top of a pond because:

• covalent bonds result in water cohesion
• hydrogen bonds result in water cohesion (surface tension)
• water striders have adapted to take advantage of water cohesion
• low surface tension of water

Why can water have no net charge but have slight charges in different parts of the molecule?

• The oxygen end is slightly negative and the hydrogen end is slightly positive
• The hydrogen end is slightly negative and the oxygen end is slightly positive
• The hydrogen and oxygen ends change in polarity
• Because it is hydrophobic

Tags

NGSS.MS-PS2-3

Attractions between water molecules are called

• Covalent bonds
• Ionic bonds
• Polar bonds
• Hydrogen bonds