General Chemistry 2 Quiz

What is the purpose of a buffer solution?

• To change the color of the solution

• To counteract a noticeable change in pH level

• To increase pH level

• To decrease pH level

Which of the following substances can form a buffer solution?

• Ca(OH)2 and HCl

• HCl and NaCl

• KOH and KCl

• NH3 and NH4Cl

What is the buffer capacity of a solution?

• The ability to maintain a constant pH

• The color change of the solution

• The quantity of acid or base that can be added before pH starts to change

• The ability to change pH drastically

Why is the buffering system in blood important?

• To maintain a constant pH for normal body functions

• To increase the pH of the blood

• To decrease the pH of the blood

• To prevent blood clotting

Which of the following is an example of an alkaline buffer?

• H2SO4 and Na2SO4

• HF and NaF

• KOH and KCl

• Ca(OH)2 and HCl

What happens to the pH of the blood during exercise?

• It remains constant

• It increases

• It decreases

• It fluctuates randomly

How does a buffer solution maintain a constant pH?

• By increasing the concentration of H+ ions

• By decreasing the concentration of OH- ions

• By reacting with added acids or bases to maintain balance

• By changing color based on pH level

What is the role of a weak base in a buffer solution?

• To maintain a constant pH

• To change the color of the solution

• To decrease pH

• To increase pH

Which pair of substances can create an acidic buffer solution?

• NH3 and NH4Cl

• H2CO3 and HCO3-

• Ca(OH)2 and HCl

• KOH and KCl

Why is it important for the body's cells to function within a narrow pH range?

• To change the structure of proteins

• To maintain enzyme activity

• To prevent chemical reactions

• To eliminate the need for buffers