What enables a buffer to keep its pH within a narrow range despite the addition of a strong base or acid? It contains a high concentration of acid false It contains a high concentration of base false It contains a high concentration of water false It contains a high concentration of acid and its corresponding conjugate base true Single Which of the following scenarios will happen when the solutes in an acid-base equilibrium contain the same ions? A weak acid or base will experience less dissociation true A weak acid or base will experience more dissociation false The solutes will exchange ions false The pH of the system will remain the same false Single One of the ways the carbonic acid-bicarbonate system maintains the pH of the blood is through exhalation. How does exhalation help ensure a steady pH? Exhalation removes excess dissolved water vapor in the blood false Exhalation eliminates carbon dioxide from the blood true Exhalation increases the concentration of H+ to balance the O2 levels in the blood false Exhalation decreases the concentration of H+ to balance the O2 levels in the blood false Single What medical condition could arise when the pH of the blood exceeds its ideal range? alkalosis true acidosis false septicemia false pyrexia false Single When you multiply the ionization constant of a weak acid with the ionization constant of its conjugate base: You will obtain the ionization constant of water true You will derive the Henderson-Hasselbach equation false You will obtain the value 14.0 false You will obtain the pH of the weak acid false Single Which of the following statements is true about the value of the dissociation constant of a weak acid? It never exceeds 1.0 x 10-14 false It is directly proportional to the dissociation constant of its conjugate base false It is equal to the reciprocal of the dissociation constant of its conjugate base false It varies with temperature true Single What do you call the region before the equivalence point of a titration curve? Half-equivalence false Buffer region true Subcritical state false Dilute state false Single Under what condition would the pH of a weak acid become equal to its pKa? When the weak acid is diluted with water false When the acid has become totally dissociated false When a strong acid is added to it false When the concentration of its acid becomes equal to that of its conjugate base true Single Which of the following is not a variable of the Henderson-Hasselbach equation? pK_a false K_a true the concentration of the acid false the concentration of the conjugate base false Single You need a solution that can maintain a pH of 6.0. What buffer solution is best for this purpose? The buffer solution has a pK_a less than 6.0 false The buffer solution has a pK_a close to 6.0 true The buffer solution has a pK_a greater than 6.0 false The buffer solution has a pK_a of 0 false Single