Acids And Bases

Question 1

What is an acid?

Answer 1

A substance that donates protons (H+) in a solution.

Question 2

What is a base?

Answer 2

A substance that accepts protons (H+) or donates hydroxide ions (OH-) in a solution.

Question 3

What is the pH scale range?

Answer 3

0 to 14.

Question 4

What pH value indicates a neutral solution?

Answer 4

pH 7.

Question 5

True or False: Acids have a pH less than 7.

Answer 5

True.

Question 6

True or False: A base has a pH greater than 7.

Answer 6

True.

Question 7

What does a lower pH value indicate?

Answer 7

A higher concentration of hydrogen ions (H+).

Question 8

What is the pH of pure water at 25°C?

Answer 8

7.

Question 9

Which ion is responsible for acidic properties?

Answer 9

Hydrogen ion (H+).

Question 10

Which ion is responsible for basic properties?

Answer 10

Hydroxide ion (OH-).

Question 11

What is the term for a solution with a pH less than 7?

Answer 11

Acidic solution.

Question 12

What is the term for a solution with a pH greater than 7?

Answer 12

Basic (or alkaline) solution.

Question 13

True or False: Strong acids completely dissociate in water.

Answer 13

True.

Question 14

Give an example of a strong acid.

Answer 14

Hydrochloric acid (HCl).

Question 15

Give an example of a strong base.

Answer 15

Sodium hydroxide (NaOH).

Question 16

What type of reaction occurs between an acid and a base?

Answer 16

Neutralization reaction.

Question 17

What is the indicator commonly used to test pH?

Answer 17

Litmus paper.

Question 18

What color does litmus paper turn in acidic solutions?

Answer 18

Red.

Question 19

What color does litmus paper turn in basic solutions?

Answer 19

Blue.

Question 20

What is the significance of a pH of 0?

Answer 20

It indicates a highly acidic solution.

Question 21

What is the significance of a pH of 14?

Answer 21

It indicates a highly basic solution.

Question 22

What is the relationship between pH and hydrogen ion concentration?

Answer 22

As pH decreases, hydrogen ion concentration increases.

Question 23

What role do acids and bases play in biological systems?

Answer 23

They help maintain homeostasis and are involved in metabolic processes.

Question 24

What taste does an acid have

Answer 24

Sour

Question 25

What taste does a Base have

Answer 25

Bitter

Question 26

Is acid corrosive?

Answer 26

Yes

Question 27

What is the name for a corrosive acid

Answer 27

Caustic

Question 28

What is a base that can dissolve in water called

Answer 28

Alakali

Question 29

What is an ion?

Answer 29

An atom that has gained or lost electricity

Question 30

What type of of ion acids release?

Answer 30

Hydrogen (H+)

Question 31

What type of ion do bases release ?

Answer 31

Hydroxide (OH)

Question 32

What do basic products end with

Answer 32

OH

Question 33

What do acidic products start with?

Answer 33

H

Question 34

Why is water neutral?

Answer 34

Because it has equal hydroxide and hydrogen ions

Question 35

What do bases feel like?

Answer 35

Soapy or slippery feeling

Question 38

What is ocean acidification?

Answer 38

Ocean acidification refers to the decrease in pH levels of the ocean due to the absorption of excess atmospheric CO2.

Question 39

True or False: Ocean acidification can negatively impact marine organisms, especially those with calcium carbonate structures.

Answer 39

True

Question 40

Fill in the blank: The primary cause of ocean acidification is the increase of __________ in the atmosphere.

Answer 40

carbon dioxide (CO2)

Question 41

Which of the following is a consequence of ocean acidification? (A) Increased coral growth (B) Decreased shellfish populations (C) Higher fish reproduction rates

Answer 41

B) Decreased shellfish populations

Question 42

What role do phytoplankton play in the context of ocean acidification?

Answer 42

Phytoplankton are crucial for carbon cycling and can be affected by ocean acidification, impacting the entire marine food web.