Introduction to Aqueous Solutions

What is a water molecule composed of?

• 1 Hydrogen atom and 2 Oxygen atoms
• 2 Hydrogen atoms and 1 Oxygen atom
• 3 Oxygen atoms
• 2 Helium atoms and 1 Oxygen atom

Tags

NGSS.MS-PS1-1

What property of water allows it to be such a versatile solvent that it is often called the "universal solvent?"

• Purity
• Polarity and high surface tension
• High heat capacity
• Expansion upon freezing

Tags

NGSS.HS-ESS2-5

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

why does water have a high surface tension

• London dispersion forces between water molecules
• Hydrogen bonds between molecules
• strong covalent bonds in water molecules
• high kinetic energy of molecules

why is ice less dense

• hydrogen bonds in ice creates a less dense hexagonal structure 
• hydrogen bonds in ice creates a more dense hexagonal structure 
• hydrogen bonds in water are strong forces that dont let the water move
• water molecules move too fast to get into an arrangement in ice

why is water the “universal solvent

• it can only dissolves a few solutes
• it dissolves many solutes
• it can dissolve the most amount of solutes
• it can not dissolve polar solutes

Tags

NGSS.HS-ESS2-5

Attractions between water molecules are called

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

A solution is a kind of ________.

• homogeneous mixture

• compound

• element

• heterogeneous mixture

This is the part of a solution that dissolves

• Solute
• Solvent
• Solution
• Mixture 

What is a solvent?

• The substance that does the dissolving in a solution.
• The substance that is being dissolved in a solution.
• The mixing of different substances.
• The process in which neutral molecules lose or gain electrons