Chem Water, Polarity, Parts of a Solution

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.HS-LS1-6

Which letter represents hydrogen?

• A
• B
• C
• D

Which letter represents the negative end?

• A
• B
• C
• D

Tags

NGSS.HS-PS2-5

Which letter represents the positive end?

• A
• B
• C
• D

Because water has a positive and a negative end, and is attracted to other molecules it is called a ______ molecule.

• mickey mouse
• polar (tiny magnet)
• special
• miracle

Tags

NGSS.MS-PS1-1

What is a solute?

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

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

The rule that refers to polar molecules dissolving polar and nonpolar dissolving nonpolar is 

• this dissolves that
• like dissolves like
• same dissolves same
• here dissolves there

A solute that contains polar molecules will dissolve in a solvent that contains

• nonpolar molecules
• polar molecules
• covalent molecules
• equal-sized molecules

Oil molecules are nonpolar. What kind of solvent is required to remove an oil stain?

• saturated
• unsaturated
• polar
• nonpolar