MES 3: Matter & Energy: Water, pH, Reactions, Thermodynamics, & Enzymes

Question 0

How is H3O+ formed?

Answer 0

A water molecule gained a hydrogen ion from another water molecule

Question 1

What is the name for H3O+?

Answer 1

Hydronium ion

Question 2

What is the name for OH-?

Answer 2

Hydroxide ion

Question 3

What does this equation represent? H2O + H2O H3O+ + OH-

Answer 3

The dissociation of water

Question 4

What is the charge on a hydronium ion?

Answer 4

1+

Question 5

What is the charge on a hydroxide ion?

Answer 5

1-

Question 6

In a neutral solution, the concentration of hydrogen ions is (less than, equal to, or greater than) the concentration of hydroxide ions?

Answer 6

Equal

Question 7

The unequal sharing of electrons within a water molecule makes the water molecule what?

Answer 7

Polar

Question 8

The tendency of an atom to pull electrons toward itself is referred to as its what?

Answer 8

Electronegativity

Question 9

In an H2O molecule, what type of bond is found between the oxygen and hydrogens?

Answer 9

Polar covalent bonds

Question 10

In an acidic solution, the concentration of hydrogen ions is (less than, equal to, or greater than) the concentration of hydroxide ions?

Answer 10

Greater than

Question 11

In a basic solution, the concentration of hydrogen ions is (less than, equal to, or greater than) the concentration of hydroxide ions?

Answer 11

Less than

Question 12

How would we describe a solution with a pH level of 6?

Answer 12

Acidic

Question 13

What type of solution is lemon juice?

Answer 13

Acidic

Question 14

How would we describe a solution with a pH level of 7?

Answer 14

Neutral

Question 15

How would we describe a solution with a pH level of 12?

Answer 15

Basic

Question 16

What type of solution is pure water?

Answer 16

Neutral

Question 17

What type of solution is liquid soap?

Answer 17

Basic

Question 18

What type of bonds between water molecules lead to water’s cohesion?

Answer 18

Hydrogen

Question 19

A solution of pH 5 has how many times more hydrogen ions and than that of pure water?

Answer 19

100

Question 20

A space station orbiting earth is exhibiting what type of energy?

Answer 20

Kinetic energy

Question 21

What does the phrase “conservation of energy” imply?

Answer 21

Energy can neither be created nor destroyed but can be converted from one form to another.

Question 22

Chemical energy is a form of what type of energy?

Answer 22

Potential energy

Question 23

In your body, what process converts the chemical energy found in glucose into the chemical energy found in ATP?

Answer 23

Cellular respiration

Question 24

Name the three by-products of cellular respiration.

Answer 24

• Heat
• Carbon dioxide
• Water

Question 25

What does the second law of thermodynamics state?

Answer 25

In any transformation, some of the original energy is converted to heat or light, and the system becomes more disordered.

Question 26

According to the first law of thermodynamics, the total amount of energy in the universe is what?

Answer 26

Constant

Question 27

What is energy?

Answer 27

Energy is the ability to do work.