L2 Chemistry pt 2

Question 1

Ion (def)

Answer 1

An atom that entirely loses or gains on electron is an ion

Question 2

Ionic bond

Answer 2

A bond between two ions

Question 3

Hydrophilic molecule

Answer 3

molecules and ions that dissolve in water

Question 4

Hydrophobic molecule

Answer 4

molecules that do not dissolve in water

Question 5

Hydrophobic interaction

Answer 5

The hydrophobic interaction describes non polar molecules being forced together in water, because being together minimizes the disruption of hydrogen bonding in the surrounding water.

Question 6

Van der Waals interaction

Answer 6

Attraction between non polar molecules via transient dipoles

Question 7

Place the bonds in order of strongest to weakest
Hydrogen, van der walls, covalent, ionic, hydrophobic interaction

Answer 7

Covalent > Hydrogen > Ionic > Hydrophobic > Van der Waals

Question 8

Acids

Answer 8

Acids release a H+ ions (protons) in solution

Question 9

Bases

Answer 9

Bases accept a H+ (protons) in the solution

Question 10

What is a carboxyl group?
(strong or weak acid or strong or weak base?)

Answer 10

weak acid

Question 11

What is a amino group?
(strong or weak acid or strong or weak base?)

Answer 11

weak base

Question 12

how do you measure the pH?

Answer 12

using the number of protons / concentration of protons