Podcast
Questions and Answers
What is the purpose of using buffers in a solution?
What is the purpose of using buffers in a solution?
- To maintain a stable pH by neutralizing small quantities of additional acid or base (correct)
- To make the solution more acidic
- To decrease the pH of the solution
- To neutralize large quantities of acids or bases
In a buffer solution, which component neutralizes a strong base?
In a buffer solution, which component neutralizes a strong base?
- The spectator ion
- The strong acid
- The acid (correct)
- The conjugate base
What is a common buffering agent with a pKa value of 6.40?
What is a common buffering agent with a pKa value of 6.40?
- Citric acid
- Acetic acid
- KH2PO4 (correct)
- Borate
In a phosphate buffer system, what is the typical useful pH range?
In a phosphate buffer system, what is the typical useful pH range?
What is the general rule regarding the effective range of a buffer in relation to its pKa value?
What is the general rule regarding the effective range of a buffer in relation to its pKa value?
What is a key criterion for selecting a buffer?
What is a key criterion for selecting a buffer?
Which of the following is NOT a typical criterion for selecting a buffer?
Which of the following is NOT a typical criterion for selecting a buffer?
What is the principal buffer in cells?
What is the principal buffer in cells?
What happens to blood pH if someone hyperventilates?
What happens to blood pH if someone hyperventilates?
If the buffering capacity of a solution is very high, what does that indicate about the concentrations of the weak acid and its conjugate base?
If the buffering capacity of a solution is very high, what does that indicate about the concentrations of the weak acid and its conjugate base?
What is the pH of a solution after adding 1.5mL of 2.0M HCl to 10.0mL of water?
What is the pH of a solution after adding 1.5mL of 2.0M HCl to 10.0mL of water?
If you add 1.5mL of 2.0M HCl to a buffer solution, what will happen to the buffer's pH?
If you add 1.5mL of 2.0M HCl to a buffer solution, what will happen to the buffer's pH?
In a mixture of 0.55M carbonic acid and 0.55M sodium hydrogen carbonate, what is the resulting pH when 1.5mL of 2.0M HCl is added?
In a mixture of 0.55M carbonic acid and 0.55M sodium hydrogen carbonate, what is the resulting pH when 1.5mL of 2.0M HCl is added?
How does the addition of HCl impact the concentration of carbonic acid in the mixture of carbonic acid and sodium hydrogen carbonate?
How does the addition of HCl impact the concentration of carbonic acid in the mixture of carbonic acid and sodium hydrogen carbonate?
What is the significance of maintaining a specific buffer ratio in a buffer system?
What is the significance of maintaining a specific buffer ratio in a buffer system?
What happens when the concentrations of a weak acid and its conjugate base are equal in a solution according to the Henderson-Hasselbalch equation?
What happens when the concentrations of a weak acid and its conjugate base are equal in a solution according to the Henderson-Hasselbalch equation?
Which type of buffer contains a weak acid and its salt or a weak base and its salt?
Which type of buffer contains a weak acid and its salt or a weak base and its salt?
How do buffers work when a strong base is added to a buffer solution?
How do buffers work when a strong base is added to a buffer solution?
What happens when a strong acid is added to a buffer solution?
What happens when a strong acid is added to a buffer solution?
What characterizes a buffer's resistance to changes in pH?
What characterizes a buffer's resistance to changes in pH?
What is the role of a weak acid in an aqueous solution?
What is the role of a weak acid in an aqueous solution?
How is the strength of an acid described?
How is the strength of an acid described?
Which concept connects the equilibrium constant (K) to the pH of a solution containing both an acid and a base?
Which concept connects the equilibrium constant (K) to the pH of a solution containing both an acid and a base?
What is the ionization constant for water at 25°C?
What is the ionization constant for water at 25°C?
What is the molar concentration of water used to calculate the ionization constant for water at 25°C?
What is the molar concentration of water used to calculate the ionization constant for water at 25°C?
What determines the polarity of a molecule?
What determines the polarity of a molecule?
What type of bonds are polar covalent bonds?
What type of bonds are polar covalent bonds?
What is electronegativity in relation to a compound?
What is electronegativity in relation to a compound?
How does the geometry of a molecule affect its polarity?
How does the geometry of a molecule affect its polarity?
What does a polar covalent bond imply about electron sharing?
What does a polar covalent bond imply about electron sharing?
Which type of molecules tend to dissolve in water?
Which type of molecules tend to dissolve in water?
What type of interactions are very weak between nonpolar molecules?
What type of interactions are very weak between nonpolar molecules?
What kind of molecules have characteristics of both hydrophobic and hydrophilic regions?
What kind of molecules have characteristics of both hydrophobic and hydrophilic regions?
What is the term for a spherical arrangement of organic molecules in water solution?
What is the term for a spherical arrangement of organic molecules in water solution?
Which type of bonds are responsible for the attraction between temporary induced dipoles in micelle formation?
Which type of bonds are responsible for the attraction between temporary induced dipoles in micelle formation?
What does a Brønsted-Lowry acid donate?
What does a Brønsted-Lowry acid donate?
In the context of acids and bases, what does a Brønsted-Lowry base accept?
In the context of acids and bases, what does a Brønsted-Lowry base accept?
What is the term for molecules that contain one or more hydrophobic and one or more hydrophilic regions?
What is the term for molecules that contain one or more hydrophobic and one or more hydrophilic regions?
What is the main type of bond responsible for forming hydrophobic interactions?
What is the main type of bond responsible for forming hydrophobic interactions?
What is the key characteristic of micelles in aqueous solutions?
What is the key characteristic of micelles in aqueous solutions?
