BCH210 STUDY GUIDE EXAM
QUESTIONS WITH COMPLETE
SOLUTIONS
dissociation constant (Kd) - Answer- An equilibrium constant for the dissociation of a
complex of two or more biomolecules into its components
pH equation - Answer- pH = -log[H+]
Bronsted-Lowry concepts - Answer- Acid: proton donor
Base: proton acceptor
Acid-base reaction: proton transfer reaction
the stronger the acid, the ________ its conjugate base - Answer- weaker
What formation does equilibrium favour in dissociation/ association - Answer- Weaker
acid and weaker base
How do you maintain functionality in a biological system? - Answer- Maintain pH value
What can you use to help stabilise pH value? - Answer- Weak acids and bases as
buffers
Example of acid-base reaction for weak acids - Answer- CH3COOH + H2O →←
CH3OO- + H+
Dissociation reaction for weak acids example - Answer- CH3COOH →← CH3COO +
H+
Indication of acid strength formula - Answer- pK = -logK or pKs = -logKs
Henderson-Hasselbalch equation - Answer- pH = pKa + log [A-]/[HA] (base/acid)
Optimal buffer range - Answer- pH = pKa +/- 1
What does the concentration of a buffer determine? - Answer- The buffer capacity
When are H+ ions and OH- ions produced in the body? - Answer- H+: during anaerobic
processes ( lactic acid, ATP)
OH-: during digestion of food proteins (NH3)
QUESTIONS WITH COMPLETE
SOLUTIONS
dissociation constant (Kd) - Answer- An equilibrium constant for the dissociation of a
complex of two or more biomolecules into its components
pH equation - Answer- pH = -log[H+]
Bronsted-Lowry concepts - Answer- Acid: proton donor
Base: proton acceptor
Acid-base reaction: proton transfer reaction
the stronger the acid, the ________ its conjugate base - Answer- weaker
What formation does equilibrium favour in dissociation/ association - Answer- Weaker
acid and weaker base
How do you maintain functionality in a biological system? - Answer- Maintain pH value
What can you use to help stabilise pH value? - Answer- Weak acids and bases as
buffers
Example of acid-base reaction for weak acids - Answer- CH3COOH + H2O →←
CH3OO- + H+
Dissociation reaction for weak acids example - Answer- CH3COOH →← CH3COO +
H+
Indication of acid strength formula - Answer- pK = -logK or pKs = -logKs
Henderson-Hasselbalch equation - Answer- pH = pKa + log [A-]/[HA] (base/acid)
Optimal buffer range - Answer- pH = pKa +/- 1
What does the concentration of a buffer determine? - Answer- The buffer capacity
When are H+ ions and OH- ions produced in the body? - Answer- H+: during anaerobic
processes ( lactic acid, ATP)
OH-: during digestion of food proteins (NH3)
