$$[H^+] = 1 \times 10$$^{-5}$$ \text{ M}$$

$$\text{NaOH} \rightarrow \text{Na}^+ + \text{OH}^-$$

Question 1

Which property of water is most responsible for its ability to help regulate body temperature during exercise?

Accepted Answer

High heat of vaporization

Question 2

A solution has a pH of 5. What is the concentration of hydrogen ions $$[H^+] in $$this solution?

Accepted Answer

$$[H^+] = 1 	imes 10$$^{-5}$$ 	ext{ M}$$

Question 3

Which of the following is NOT an example of an inorganic compound found in the human body?

Accepted Answer

Glucose

Question 4

What is the main reason ions such as sodium and potassium are vital for homeostasis?

Accepted Answer

They help maintain electrical currents and osmotic balance in cells.

Question 5

Which of the following statements about acids and bases is correct?

Accepted Answer

Acids are proton donors and bases are proton acceptors.

Question 6

If the pH of a solution changes from 7 to 5, how does the hydrogen ion concentration change?

Accepted Answer

It increases by 100 times.

Question 7

Which of the following best describes the relationship between water molecules and ionic compounds in solution?

Accepted Answer

Water forms hydration layers around ions, allowing them to dissociate.

Question 8

Which of the following is a correct example of a base dissociating in water?

Accepted Answer

$$	ext{NaOH} ightarrow 	ext{Na}^+ + 	ext{OH}^-$$

Question 9

Which of the following best explains why pure water is considered neutral?

Accepted Answer

It contains equal concentrations of $$H^+$$ and $$OH^-$$ ions.

Question 10

A patient’s blood pH drops from 7.4 to 7.0. What does this indicate about the hydrogen ion concentration?

Accepted Answer

Hydrogen ion concentration has increased, making the blood more acidic.

Question 11

Which of the following is a property of water that is critical for its role as the body’s major transport medium?

Accepted Answer

Polar solvent properties

Question 12

Which of the following compounds is NOT classified as an electrolyte?

Accepted Answer

Glucose

Question 13

Which statement best describes the difference between organic and inorganic compounds?

Accepted Answer

Organic compounds contain carbon and are usually covalently bonded.

Question 14

Which of the following is a correct statement about the pH scale?

Accepted Answer

Each pH unit represents a tenfold difference in hydrogen ion concentration.

Question 15

Which of the following is a common salt found in the human body?

Accepted Answer

NaCl

Question 16

Which of the following best explains why water has a high heat capacity?

Accepted Answer

It can absorb and release large amounts of heat with little temperature change.

Question 17

Which of the following is true regarding the dissociation of salts in water?

Accepted Answer

Salts dissociate into cations and anions, which can conduct electrical currents.

Question 18

Which of the following is a correct example of an acid dissociating in water?

Accepted Answer

$$	ext{HCl} ightarrow 	ext{H}^+ + 	ext{Cl}^-$$

Question 19

Which of the following best describes the pH of pure water?

Accepted Answer

pH 7, neutral

2B: Biochemistry Foundations for Anatomy & Physiology: Inorganic Compounds, Acids, Bases, and pH

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