Q: A solution has a pH of 3. What is the concentration of hydrogen ions $$[H^+] in $$this solution?

$$[H^+] = 1 \times 10$$^{-3}$$\ \mathrm{M}$$

Question 1

Which property of water allows it to minimize temperature changes in living organisms, helping to maintain homeostasis?

Accepted Answer

High specific heat

Question 2

A solution has a pH of 3. What is the concentration of hydrogen ions $$[H^+] in $$this solution?

Accepted Answer

$$[H^+] = 1 	imes 10$$^{-3}$$\ \mathrm{M}$$

Question 3

Which of the following best explains why water is not effective at removing oil from a salad bowl?

Accepted Answer

Oil molecules are nonpolar and do not interact with polar water molecules

Question 4

Which of the following is a correct example of a dehydration synthesis reaction?

Accepted Answer

Combining two monosaccharides to form a disaccharide and water

Question 5

If the pH of a solution changes from 6 to 4, how does the hydrogen ion concentration change?

Accepted Answer

It increases by 100 times

Question 6

Which of the following statements about electrolytes is TRUE?

Accepted Answer

Electrolytes dissociate into ions in water and can conduct electrical currents

Question 7

Which of the following is a function of buffers in the human body?

Accepted Answer

Buffers minimize large swings in pH by accepting or donating hydrogen ions

Question 8

Which of the following best describes a saturated fatty acid?

Accepted Answer

It contains only single covalent bonds between carbon atoms and is solid at room temperature

Question 9

A patient has a blood pH of 7.1. Which of the following best describes this condition?

Accepted Answer

The blood is acidic

Question 10

Which of the following is a correct representation of a neutralization reaction?

Accepted Answer

$$\mathrm{NaOH} + \mathrm{HCl} \rightarrow \mathrm{NaCl} + \mathrm{H_2O}$$

Question 11

Which of the following best explains why sodium, potassium, and calcium ions are important in the body?

Accepted Answer

They help maintain electrical currents and are vital for homeostasis

Question 12

Which of the following is a property of water that helps protect organs from physical trauma?

Accepted Answer

Cushioning

Question 13

Which of the following best describes the relationship between monomers and polymers?

Accepted Answer

Polymers are formed by joining monomers through dehydration synthesis reactions

Question 14

Which of the following is a correct statement about acids?

Accepted Answer

Acids release hydrogen ions ($$H^+) in $$solution

Question 15

Which of the following is a correct formula for acetic acid?

Accepted Answer

$$\mathrm{HC_2H_3O_2}$$

Question 16

Which of the following best describes the role of water as a solvent in the body?

Accepted Answer

Water forms hydration layers around charged molecules, allowing them to be transported

Question 17

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

Accepted Answer

A solution with pH 2 has a higher concentration of $$[H^+]$$ than a solution with pH 5

Question 18

Which of the following is a correct description of a base?

Accepted Answer

A base is a proton acceptor and releases hydroxyl ions ($$OH^-) in $$solution

Question 19

Which of the following best explains why buffers are important in blood?

Accepted Answer

They help maintain a narrow pH range by neutralizing excess acids or bases

Question 20

A disaccharide is formed from two glucose molecules by dehydration synthesis. If glucose has the formula $$C_6H_{12}O_6$, what is the formula for the disaccharide maltose?

Accepted Answer

$$C_{12}H$$_{22}$$O_{11}$

Fundamentals of Chemistry in Anatomy & Physiology: Organic, Inorganic Compounds, Water, Acids, Bases, and pH

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