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Questions and Answers
How can the concentration of hydroxide ions in a solution be expressed in terms of the pOH value?
How can the concentration of hydroxide ions in a solution be expressed in terms of the pOH value?
- $pOH = log[OH^-]$
- $pOH = -log[OH^-]$ (correct)
- $pOH = log[H^+]$
- $pOH = -log[H^+]$
How does the net direction of an acid-base reaction depend on relative acid and base strengths?
How does the net direction of an acid-base reaction depend on relative acid and base strengths?
- The reaction proceeds to the lesser extent in the direction where a weaker acid and weaker base form a stronger acid and stronger base.
- The reaction proceeds to the greater extent in the direction where a stronger acid and stronger base form a weaker acid and weaker base. (correct)
- The reaction proceeds to the greater extent in the direction where a weaker acid and stronger base form a stronger acid and weaker base.
- The reaction proceeds randomly without any relation to the strengths of the acids and bases involved.
What is one way to determine the strength of acids based on their pH values?
What is one way to determine the strength of acids based on their pH values?
- Acid strength increases as the pH value increases.
- Acid strength remains constant regardless of the pH value.
- Acid strength increases as the pH value decreases. (correct)
- Acid strength is not related to the pH value of the solution.
What happens to the strength of an acid as its percent ionization increases?
What happens to the strength of an acid as its percent ionization increases?
What does percent ionization of an acid measure?
What does percent ionization of an acid measure?
How is the strength of a base determined from its pOH value?
How is the strength of a base determined from its pOH value?
What role does water play in reactions with acids?
What role does water play in reactions with acids?
What is the term for molecules or ions that can donate or accept a proton?
What is the term for molecules or ions that can donate or accept a proton?
In the autoionization reaction of water, what do some water molecules do?
In the autoionization reaction of water, what do some water molecules do?
How does water behave when it reacts with the base NH3?
How does water behave when it reacts with the base NH3?
Which species is the most important amphiprotic species?
Which species is the most important amphiprotic species?
What happens to a water molecule when it accepts a proton?
What happens to a water molecule when it accepts a proton?
What is the key variable that determines the concentration of H3O+ in the Henderson-Hasselbach equation?
What is the key variable that determines the concentration of H3O+ in the Henderson-Hasselbach equation?
In the Henderson-Hasselbach equation, what does pKa represent?
In the Henderson-Hasselbach equation, what does pKa represent?
What is the relationship described by the Henderson-Hasselbach equation for any conjugate acid-base pair?
What is the relationship described by the Henderson-Hasselbach equation for any conjugate acid-base pair?
In a weak base dissociation, what does pKb represent?
In a weak base dissociation, what does pKb represent?
Which term in the Henderson-Hasselbach equation relates to the concentration of the weak acid?
Which term in the Henderson-Hasselbach equation relates to the concentration of the weak acid?
What does the Henderson-Hasselbach equation enable the calculation of for a buffer solution?
What does the Henderson-Hasselbach equation enable the calculation of for a buffer solution?
What is the pH of a buffer solution containing 0.1 M CH₃COOH and a 0.1 M solution of CH₃COONa?
What is the pH of a buffer solution containing 0.1 M CH₃COOH and a 0.1 M solution of CH₃COONa?
If 1.0 mL of 0.10 M NaOH is added to 100 mL of the buffer in the first question, what will be the new pH?
If 1.0 mL of 0.10 M NaOH is added to 100 mL of the buffer in the first question, what will be the new pH?
When 1.0 mL of 0.10 M HCl is added to 100 mL of the buffer in the previous question, what is the resulting pH?
When 1.0 mL of 0.10 M HCl is added to 100 mL of the buffer in the previous question, what is the resulting pH?
What is the purpose of a buffer solution?
What is the purpose of a buffer solution?
Why is a buffer solution made using an acid-base conjugate pair?
Why is a buffer solution made using an acid-base conjugate pair?
How can a simple buffer solution be prepared?
How can a simple buffer solution be prepared?
Why are the equilibrium concentrations of the acid and conjugate base assumed to be the same in a buffer solution?
Why are the equilibrium concentrations of the acid and conjugate base assumed to be the same in a buffer solution?
What role do acetic acid and sodium acetate play in a simple buffer solution?
What role do acetic acid and sodium acetate play in a simple buffer solution?
Why should a buffer solution not consume the acid and base components in a neutralization reaction?
Why should a buffer solution not consume the acid and base components in a neutralization reaction?
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