Multiple Choice
Which of the following statements about buffers is true?
A) A buffer composed of a weak acid of pKa = 5 is stronger at pH 4 than at pH 6.
B) At pH values lower than the pKa,the salt concentration is higher than that of the acid.
C) The pH of a buffered solution remains constant no matter how much acid or base is added to the solution.
D) The strongest buffers are those composed of strong acids and strong bases.
E) When pH = pKa,the weak acid and salt concentrations in a buffer are equal.
Correct Answer:
Verified
Correct Answer:
Verified
Q8: (a)Briefly define "isotonic," "hypotonic," and "hypertonic" solutions.<br>(b)Describe
Q10: Which of the following properties of water
Q16: Which of the following is true about
Q24: Explain the fact that ethanol (CH<sub>3</sub>CH<sub>2</sub>OH) is
Q39: A compound is known to have a
Q57: What is the pH of a solution
Q62: Explain with an appropriate diagram why amphipathic
Q73: For a weak acid with a pK<sub>a</sub>
Q77: Suppose you have just added 100 mL
Q81: Osmosis is movement of a:<br>A) charged solute